Question

20. If n=100, A=25 and xbar=25, then find the FiDi
(a) 20 (b) o (c) 100 (d) 25
​

Answer 1

Answer :

Correct option is

A

27

Mean=a+

∑f

i

∑f

i

u

i

×h,u

i

=

h

x

i

−a

a=25,h=10,∑f

i

u

i

=20,∑f

i

=100

Mean =25+

100

20

×10=27

Answer 2

Answer:

the answer is (b) zero