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If you have 5 different books and want to select 2 to read, how many combination

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Question: If you have 5 different books and want to select 2 to read, how many combinations are possible?

Options:

  1. 10
  2. 15
  3. 20
  4. 25

Correct Answer: 10

Solution: 

The number of combinations of 2 books from 5 is C(5, 2) = 5! / (2!(5-2)!) = 10.

If you have 5 different books and want to select 2 to read, how many combination

Practice Questions

Q1
If you have 5 different books and want to select 2 to read, how many combinations are possible?
  1. 10
  2. 15
  3. 20
  4. 25

Questions & Step-by-Step Solutions

If you have 5 different books and want to select 2 to read, how many combinations are possible?
  • Combinations – The concept of combinations involves selecting items from a larger set where the order of selection does not matter.
  • Factorial – Factorial is a mathematical operation that multiplies a number by all positive integers less than itself, denoted by n!.
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