Question

Plz solve Qno. 40
I will be glad if you do so...

Answer 1

Answer:

its a grouped data

Step-by-step explanation:

Mean will be 39.4

median will be 36.8

mode will be 34.28

It took a lot of time

But I hope it helped you (´∀`)

Answer 2

Step-by-step explanation:

CI fi xi fixi cf

10-20 2 15 30 2

20-30 5 25 125 7

30-40 8 35 280 15

40-50 4 45 180 19

50-60 2 55 110 21

60-70 4 65 260 25

mean=sum of fixi/sum of fi

=985/25

=39.5

mode=l+(f1-f0/2f1-f0-f2)h

l=30, f1=8 , f0=5, f2=4, h=10

=30+(8-5/16-5-4)10

=30+(4/7)10

=(210+40)7

=250/7

=35.714

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

=30+((12.5-7)/35)10

=30+((5.5/35)10

=(210+11)/7

=221/7

=31.57