Question
The mean age of 27 students is 13 years. The boys’ average is (b + 3) years and the girls’ average is (b − 6) years. If boys : girls = 4 : 5, determine
The mean age of 27 students is 13 years. The boys’ average is (b + 3) years and the girls’ average is (b − 6) years. If boys : girls = 4 : 5, determine
b.
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