The average of three numbers is 20. If one number is 10, what is the average of the other two numbers?

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Q: The average of three numbers is 20. If one number is 10, what is the average of the other two numbers?

Solution: Total of three numbers = 20 * 3 = 60. The sum of the other two = 60 - 10 = 50. Average = 50 / 2 = 25.

Steps: 5

Step 1: Understand that the average of three numbers is 20.
Step 2: Calculate the total of the three numbers by multiplying the average by the number of numbers: 20 * 3 = 60.
Step 3: One of the numbers is given as 10.
Step 4: To find the sum of the other two numbers, subtract the known number from the total: 60 - 10 = 50.
Step 5: Now, to find the average of the other two numbers, divide their sum by 2: 50 / 2 = 25.