Question

Let X~B (n,p) if n=12, E(x)=5 find p & s.d(x)​

Answer 1

Answer:

Correct option is

B

2.4

In the given Binomial Distribution,

Number of trials, n=25

Let probability of success =p

Mean =E(x)=10

⇒np=10

25p=10

p=

25

10

=

5

2

Then probability of failure, q=1−p=

5

3

Standard deviation for Binomial Distribution =

npq

=

25×

5

2

×

5

3

=

6

≈2.45

Step-by-step explanation:

hope it is helpful