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

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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.	160 cms
B.	159 cms
C.	158 cms
D.	157 cms
Answer» C. 158 cms

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