In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the same class is 87. If the girls and boys are in the ratio 4: 5, average marks of the whole class (approx.) is:
Answer & explanation
Correct answer: option 4
Girls Boys
4 : 5
Avg. marks 85 87
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Total marks 340 435
Avg = \(\frac{340+ 435}{9}\) = 86.1