The average score of boys in class 10th in an exam is 71 and that of girls in the class is 73. If the average score of class 10th is 71.8 then find the ratio of number of boys to number of girls in the class
a)1:2
b)2:1
c)2:3
d)3:2
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d is the answer bro or sis
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Answer:
d)3:2
Step-by-step explanation:
total score of boys = 71x
total score of girls = 73y
Therefore, 71x+73y(x+y)=71.8
=> 71x+73y=71.8x+71.8y
0.8x = 1.2 => xy=1.20.8=32
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