Answer :
Final answer:
A 10 year-old child with a mental age of 12 would have an IQ of 120, placing them in the higher ranges of the IQ scale.
Explanation:
The Intelligence Quotient or IQ is generally calculated by dividing a person's mental age by their chronological age and then multiplying the result by 100. In this case, if a child is 10 years old and has a mental age of 12, we would divide 12 by 10 to get 1.2. Multiplying 1.2 by 100 gives us an IQ of 120. This means that the child's IQ according to this method of calculation would be 120, which falls into the higher ranges of the IQ scale, often associated with superior intelligence and aptitude for learning.
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