Question

The mean marks out of hundred of boys and girls in an examination are 70 and 73 respectively if the mean marks of all the students in that examination is 71 find the ratio of the number of boys to the number of girls

Answer 1

let no of boys = x
no of girls = 100 -x
70x  + 7300 - 73 x =7100
solve this equation
x=200/3
x : 100 - x
200/3  : 100 - 200/3
200 /3 : 100 /3
2:1

Answer 2

Answer:

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