You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A male child of 15 years with a mental age of 12 years has an IQ of - and explain in detail?
IQ = mental age/chronological age *100 mental age is 12 yr, chronological age is 15 yr so 12/15 =0.8, 0.8*100= 80 ref; (page no;637) 25th edition of PARK's textbook of Preventive and Social medicine