The average height of 30 girls out of a class of 40 is 160 cms and that of the remaining girls is 156 cms. the average height of the whole class is ?

The average height of 30 girls out of a class of 40 is 160 cms and tha

1.	The average height of 30 girls out of a class of 40 is 160 cms and that of the remaining girls is 156 cms. the average height of the whole class is ?
A.	11.8
B.	25
C.	29.5
D.	30
Answer» E.

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The average height of 30 girls out of a class of 40 is 160 cms and that of the remaining girls is 156 cms. the average height of the whole class is ?

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