The probability of rolling a 6 would be 1/6 or 16.67%
Ratio is 5girls:7boys with total 72 students
5+7= 12
72➗12= 6
6(5:7)= 30 girls : 42 boys
New ratio is 3:4 with 48 boys
48➗4= 12
So for girls 3x12= 36
<span>So started with 30 girls ended with 36 girls... 6 girls joined band during the school year.</span>
Divide by the coefficient of x.
x = 27/47
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Answer: They were not correct it was bigger by 2.5 so the people were wrong