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1 .
The average score of boys in an examination of a school is 71 and that of the girls is 73. The average score of the whole school in that examination is 71.8. Find the ratio of the number of boys to the number of girls that appeared in the examination.
[ A ]    4 : 5
[ B ]    3 : 2 right
[ C ]    3 : 5
[ D ]    5 : 2
[ E ]    None of these
Answer : Option B
Explanation :
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