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Answer :
Answer:
140
Explanation:
William Stern, the German psychologist, devised the fundamental definition of intelligence quotient or IQ in 1912. He defined IQ as a ratio of an estimated mental age and actual age by multiplying it with 100. The equation can be reached thus:
100×(mental age/actual age).
In case of Sara, her actual age is 10 and her mental age is 14. Therefore, her IQ is equal to 100 x 14/10 = 140
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