Question

Q.14) If E (X) = 6 and Var (X) = 4.2 find n & p.​

Answer 1

Answer:

p=0.3, n=20

Explanation:

From the question, we have

E (X) = 6 and Var (X) = 4.2

E(x)=np=6

Var⁡(x)-4.2=np(1-p)

4.2/6=1-p

0.7=1-p

p=0.3

n=6/0.3=20

n=20

Divide:

It is the multiplication operation's opposite. It is described as the process of creating equitable groups. When dividing numbers, we divide a larger number down into smaller ones such that the larger number obtained will be equal to the multiplication of the smaller numbers. One of the four fundamental mathematical operations, along with addition, subtraction, and multiplication, is division. Division is the process of dividing a larger group into smaller groups so that each group contains an equal number of things.

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