The average age of 3 friends is 23. Even if the age of the 4th friend is added, the average remains 23. What is the age of the 4th friend?
21 years
32 years
34 years
23 years
A
21 years
B
23 years
C
32 years
D
34 years
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Solution
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The correct option is B 23 years Sum of the ages of 3 friends =3×23=69years Sum of the ages of 4 friends =4×23=92years ∴ Age of 4th friend = 92 years - 69 years = 23 years.
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