Question

If Ef= 1295, 259 then find the total frequency.​

Answer 1

Step-by-step explanation:

As we know that mean of the data is given as-

x

ˉ

=

∑f

i

∑f

i

x

i

Given that:-

x

ˉ

=6

∑f

i

x

i

=2p+52

∑f

i

=11

Therefore,

11

2p+52

=6

⇒2p+52=66

⇒2p=66−52

⇒p=

2

14

=7

Hence the value of p is 7.

Hence the correct answer is 7.