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William Stern's formula for the intelligence quotient was mental age/chronological age × 100. What is the IQ of a 12-year-old with a mental age of 9? a. 125 b. 135 c. 75 d. 85
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William Stern's formula for the intelligence quotient was mental age/chronological age × 100. What is the IQ of a 12-year-old with a mental age of 9?

a. 125
b. 135
c. 75
d. 85

User Sanit
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William Stern's formula for the intelligence quotient was mental age/chronological age × 100. What is the IQ of a 12-year-old with a mental age of 9?

c. 75


User Bauerpauer
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