Question

Find the variance of a binomial
distribution with 50 trials and p= 0.4
​

Answer 1

Concept Introduction: Probability is used in every field of life.

Given:

We have been Given:

$p = 0.4$

$n = 50$

To Find:

We have to Find: Variance.

Solution:

According to the problem,

$variance = n \times p \times q$

$q = 1 - p = 1 - 0.4 = 0.6$

therefore, Variance is

$= n \times p \times q \\ = 50 \times 0.6 \times 0.4 \\ = 12$

Final Answer: Variance is

$12$

#SPJ2

Answer 2

Answer:

12

Step-by-step explanation:

To find the variance need to put the values in the formula:

v=nxpxq

Given: number of trials are 50 and p=0.4

Find: Need to find the binomial distribution

Calculation:

Put the values in the formula: v=nxpxq

v=50x0.4xq

q=1-p

q=1-0.4

q=0.6

So,

v=50x0.4x0.6

v=30x0.6

v=12