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Question

The average age of three friends Sam, Samuel, and Chris is 27 years. If the average age of Samuel and Chris is 29 years, what is the age of Sam in years?

A

26
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B

25
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C

30
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D

23
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Solution

The correct option is D
23
Given that:
Average age of Sam, Samuel, and Chris =27 years
Average age of Samuel and Chris =29 years
Step 1: Sum of total age of Sam, Samuel, and Chris = Average age × 3
=27×3
=81(1)

Step 2: Sum of total age of Samuel and Chris = Average age × 2
=29×2
=58(2)
Step 3: Substracting equation (2) from equation (1) will give the age of Sam.
So, Sam's age =8158
=23 years


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