杭州交通信息网怎样登陆foxmail邮箱:math!!!!!!math!!!!!!!!
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The ratio of boys to girls in a senior class is 5:3. If 9/10 of the boys may graduate and all the girls may or may not graduate, what is the maximum part of the senior class that may graduate?
maximum part=[5*9/10+3] /（3+5）= 15/16
5/(5+3)*(1-9/10)=1/16