SOLUTION: one's intelligence quotient, or IQ, varies directly as a person's mental age and inversely as that person's chronological age. A person with a mental age of 27 and a chronological
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Question 460627: one's intelligence quotient, or IQ, varies directly as a person's mental age and inversely as that person's chronological age. A person with a mental age of 27 and a chronological age of 20 has an IQ of 135. What is the chronological age of a person with a mental age of 30 and an IQ of 120? Answer by sudhanshu_kmr(1152) (Show Source):
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IQ * CHRONOLOGIAL AGE / MENTAL AGE = CONSTANT
135*20/27 = 120*X/30
=> X = 135 *20*30 /(120*27)
=> X = 25
so, chronologial age = 25
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