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Based on the Stanford-Binet intelligence scales, what would be the IQ of a ten-year-old who has a mental age of fifteen?

Answer :

A mental age of 15 and a chronological age of 10, her IQ is B) 150.

To determine Marjorie's IQ based on the given information, we use the formula: IQ = (mental age ÷ chronological age) × 100.

Marjorie's mental age is 15, and her chronological age is 10.

Applying the formula:

IQ = (15 ÷ 10) × 100 = 1.5 × 100 = 150

Complete question is shown below:

Based on the Stanford-Binet Intelligence Scales, ten-year-old Marjorie has a mental age of fifteen. What is her IQ?

A. 10

B. 150

C. 100

D. 15