BITSAT 2018 Paper

In Binomial distribution, Mean = np,Variance = npq and the mode is r if for x = r, the probability function p(x) is maximum.Given np = 4 and npq = 3
∴ q =

3

4

and p = 1 - q = 1 -

3

4

=

1

4

Also, n =

4

p

=

4

1∕4

= 16
Now, (n + 1) p = (16 + 1)

1

4

=

17

4

= 4 +

1

4

⇒ The distribution will have unique mode(unimodal) & the mode = 4