Q. 144.2( 62 Votes )

IQ of a person is

Answer :

Chronical age = CA = 12 years

IQ for age group of 12 is 80 ≤ IQ ≤ 140.

Let MA denote Mental Age

80 ≤ IQ ≤ 140

Putting

⇒ 9.6 ≤ MA ≤ 16.8

∴ Range of mental age of the group of 12 years old children is

9.6 ≤ MA ≤ 16.8

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