Question

Find the missing frequency from median .if we have C.I =0-10,10-20,20-30,30-40,40-50,50-60,60-70 and frequency =10,20,X,40,Y,25,15 And Given that median =35

Answer 1

Answer:

Step-by-step explanation: We know,

Median= l+(n/2-cf)/f*h

Now,

Median=35

n=170 ; also n=110+x+y

therefore, x+y=60

l=20

cf=30

f=30+x

h=10

again putting values in formula

35= 20 +(170/2- 30) / x+30*10

35= 20+ (85-30) / x +30* 10

15/10=55/x+30

1.5(x+30)=55

x+30=36.66

x=6.66

y=53.34