Q. How many ways can 3 letters be chosen from the word 'COMBINATION'?
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Solution
The number of ways to choose 3 letters from 11 distinct letters is 11C3 = 165.
Correct Answer: B — 60
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Q. How many ways can 3 men and 2 women be arranged in a line if the men must be together?
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Solution
Treat the 3 men as one unit. So, we have 3 units (MMM, W, W). Arrangements = 4! * 3! = 24 * 6 = 144.
Correct Answer: B — 120
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Q. How many ways can 3 red balls and 2 blue balls be arranged in a row?
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Solution
The arrangements = 5! / (3! * 2!) = 10.
Correct Answer: A — 10
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Q. How many ways can 3 red, 2 blue, and 1 green balls be arranged in a line?
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Solution
The arrangements = 6! / (3! * 2! * 1!) = 60.
Correct Answer: A — 60
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Q. How many ways can 3 red, 2 blue, and 1 green balls be arranged in a row?
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Solution
The total arrangements = 6! / (3! * 2! * 1!) = 60.
Correct Answer: A — 60
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Q. How many ways can 4 different books be chosen from a shelf of 10 books?
A.
210
B.
120
C.
240
D.
300
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Solution
The number of ways to choose 4 books from 10 is C(10, 4) = 210.
Correct Answer: A — 210
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Q. How many ways can 4 different colored balls be arranged in a line?
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Solution
The number of arrangements is 4! = 24.
Correct Answer: B — 24
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Q. How many ways can 4 different colored balls be placed in 3 different boxes?
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Solution
Each ball can go into any of the 3 boxes, so the total ways = 3^4 = 81.
Correct Answer: A — 81
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Q. How many ways can 4 different fruits be selected from a basket of 10 fruits?
A.
210
B.
120
C.
300
D.
150
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Solution
The number of ways to choose 4 fruits from 10 is given by 10C4 = 210.
Correct Answer: A — 210
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Q. How many ways can 4 different letters be chosen from the word 'COMBINATION'?
A.
210
B.
126
C.
70
D.
84
Show solution
Solution
The number of ways to choose 4 letters from 11 distinct letters is 11C4 = 330.
Correct Answer: A — 210
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Q. How many ways can 4 different letters be selected from the word 'COMBINATION'?
A.
210
B.
120
C.
60
D.
30
Show solution
Solution
The number of ways to choose 4 letters from 11 distinct letters is 11C4 = 330.
Correct Answer: A — 210
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Q. How many ways can 4 different prizes be awarded to 3 students?
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Solution
The number of ways to award 4 different prizes to 3 students is 3^4 = 81.
Correct Answer: C — 36
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Q. How many ways can 4 different prizes be distributed among 3 students?
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Solution
Each prize can go to any of the 3 students, so the total ways = 3^4 = 81.
Correct Answer: A — 81
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Q. How many ways can 4 students be selected from a group of 10?
A.
210
B.
120
C.
150
D.
180
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Solution
The number of ways is C(10, 4) = 210.
Correct Answer: A — 210
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Q. How many ways can 5 different books be arranged on a shelf?
A.
60
B.
120
C.
100
D.
80
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Solution
The number of arrangements of 5 different books is 5! = 120.
Correct Answer: B — 120
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Q. How many ways can 5 different books be selected from a shelf of 10 books?
A.
252
B.
120
C.
200
D.
300
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Solution
The number of ways is C(10, 5) = 252.
Correct Answer: A — 252
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Q. How many ways can 5 different letters be arranged such that two specific letters are always together?
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Solution
Treat the two specific letters as one unit. Then, we have 4 units to arrange: 4! = 24. The two letters can be arranged in 2! = 2 ways. Total = 24 * 2 = 48.
Correct Answer: B — 60
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Q. How many ways can 5 different letters be arranged such that two specific letters are never together?
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Solution
Total arrangements = 5! = 120. Arrangements with the two letters together = 4! * 2! = 48. So, arrangements where they are not together = 120 - 48 = 72.
Correct Answer: C — 72
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Q. How many ways can 5 different letters be selected from the alphabet?
A.
26
B.
3003
C.
156
D.
120
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Solution
The number of ways to choose 5 letters from 26 is C(26, 5) = 65780.
Correct Answer: B — 3003
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Q. How many ways can 5 different prizes be awarded to 3 students?
A.
60
B.
100
C.
150
D.
200
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Solution
The number of ways to award 5 different prizes to 3 students is 3^5 = 243.
Correct Answer: C — 150
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Q. How many ways can 6 different books be arranged on a shelf if 2 specific books must be together?
A.
120
B.
720
C.
240
D.
480
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Solution
Treat the 2 specific books as one unit. Then we have 5 units to arrange: 5! * 2! = 240.
Correct Answer: C — 240
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Q. How many ways can 6 people be arranged in a circle?
A.
720
B.
120
C.
60
D.
30
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Solution
The number of arrangements in a circle is (n-1)! = (6-1)! = 5! = 120.
Correct Answer: A — 720
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Q. How many ways can 6 people be divided into 2 groups of 3?
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Solution
The number of ways to divide 6 people into 2 groups of 3 is (6! / (3!3!)) / 2 = 20.
Correct Answer: A — 20
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Q. How many ways can a committee of 3 be formed from 5 people?
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Solution
The number of ways to choose 3 from 5 is C(5,3) = 10.
Correct Answer: A — 10
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Q. How many ways can you arrange the letters in the word 'MATH'?
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Solution
The number of arrangements = 4! = 24.
Correct Answer: B — 24
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Q. How many ways can you arrange the letters of the word 'BANANA'?
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Solution
The word 'BANANA' has 6 letters with 'A' repeating 3 times and 'N' repeating 2 times. The arrangements are 6!/(3!2!) = 60.
Correct Answer: B — 30
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Q. How many ways can you choose 3 fruits from a basket of 5 different fruits?
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Solution
The number of ways to choose 3 fruits from 5 is given by 5C3 = 10.
Correct Answer: A — 10
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Q. How many ways can you form a committee of 3 from a group of 10 people?
A.
120
B.
90
C.
80
D.
100
Show solution
Solution
The number of ways to form a committee of 3 from 10 is given by 10C3 = 120.
Correct Answer: A — 120
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Q. How many ways can you select 2 fruits from 5 different fruits?
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Solution
The number of ways to choose 2 from 5 is given by 5C2 = 10.
Correct Answer: A — 10
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Q. How many ways can you select 2 students from a group of 8?
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Solution
The number of ways to select 2 students from 8 is given by 8C2 = 28.
Correct Answer: A — 28
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