1.

In the following frequency distribution, find the median class. What is the value of mean height ?

Answer»

155.625
`156.250`
`158.500`
`159.275`

Solution :Now `""3M_(d)=M_(o)+2M`
`(3xx935)/(6)=156.25+2M`
`2xx935=4xx156.25+8M`
`1870=625+8M`
`8M=1870-625=1245`
`M=(1245)/(8)=155.625`
Thus (a) is CORRECT option.


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