The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (2024)

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Solution

When c=12, we have IQ=m12×100=25m3

∴ 80≤IQ≤140⇒80≤25m3≤140

⇒ 80≤25m3 and 25m3≤140

⇒ 325×80≤m and m≤140×325

⇒ 485≤m and m≤845

⇒9.6≤m≤16.8

Hence, the required mental age for a group of 12-year children is 9.6 years or more and 16.8 years or less.

See Also
[Solved] If a child has the mental age of 5 years and chronological a


The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (1)

The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (2)

Suggest Corrections

The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (3)

The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (4)

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The IQ of person is given by the formula, IQ = m / c × 100, where m is the mental age and c is the chromological age. If 80 ≤ IQ ≤ 140 for a group of 12 year children, find the range of their mental age. (2024)
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