The mean marks of boys and girls in periodical test are 36and 39 . if the mean marks of all students of class 9 in that test are37 . find the ratio of boys to the number of girls
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Answer:
2:1
Step-by-step explanation:
Let x and be the no. of boys and girls respectively.
total marks scored by boys in the test = 36x
total marks scored by girls = 39y
total marks scored by both = 37(x+y) = 36x + 39 y
on solving.... x = 2y
x/y=2
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