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
