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IQ = (MA / CA) x 100. For 12 year olds with 80 ≤ IQ ≤ 140, what is the range of mental age MA?
A8 ≤ MA ≤ 14
B9.6 ≤ MA ≤ 16.8
C6.8 ≤ MA ≤ 9.6
D12 ≤ MA ≤ 21
Answer & Solution
Correct answer: B. 9.6 ≤ MA ≤ 16.8
MA = IQ x 12 / 100, giving 0.8 x 12 = 9.6 at the low end and 1.4 x 12 = 16.8 at the high end.
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