Q. 93.9( 17 Votes )

The mean ma

Answer :

Let the sum of marks of boys be x and the number of boys be B


that of girls be y and G respectively


Mean marks for boys = 70



x = 70B


Mean marks for girls = 73



y = 73G


Mean marks for whole class = 71





2G = B


B:G = 2:1


So, the ratio of number of girls to the number of boys is 2: 1


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