I.Q. of a person is given by I=MC×100, where M is mental age and C is chronological age. If 80≤I≤140 for a group of 12 years old children, then their mental age can be
A
10
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B
13
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C
14
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D
17
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Solution
The correct options are A10 B13 C14 80≤MC×100≤140 ⇒8≤M12×10≤14 ⇒96≤10M≤168 ⇒9.6≤M≤16.8