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GMAT Focus 1: 735 Q90 V89 DI81
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Question language is tedious as question taker will construe all given part of working life within his tenure. Therefore, he'll answer 60+16=76.
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sisirkant
Hello, Can you any please explain how it's 90? And more over question does not seem to be clear.

The working life is split as below:

x = (1/3 + 1/4 + /15 )x+ 16 yrs

from this it can be calculated that the total working life is 74 years approx

Since the working life started at 18, the answer is 18+74 = 92 yrs

Answer: A

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