Q273
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 closest to :
A.
86.5
B.
85.9
C.
86.4
D.
86.1
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Average of whole class