Question

The median of following frequency distribution is
`{:(,"Class",,fi),(,60-70,,5),(,70-80,,15),(,80-90,,20),(,90-100,,30),(,100-110,,20),(,110-120,,8):}`
A. 92
B. 92.5
C. 93
D. 93.5

Answer 1

Correct Answer - C
`{:(,Class,,fi,,C.f),(,60-70,,5,,5),(,70-80,,15,,20),(,80-90,,20,,40),(,90-100,,30,,70),(,100-110,,20,,90),(,110-120,,8,,98):}`
`(N)/(2)=(98)/(2)=49`, Median class
`rArr(90-100),` f = 30
`l=90, F=40, h=10`
Median = `l+((N)/(2)-F)/("f")xxh`
`=90+(49-40)/(30)xx10=93`