Question

A random Variable x takes the values 0,1,2 it's mean is 1.2
If P(x=0) = 0.3 then P(X = 1) = ? ​

Answer 1

Answer:

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Answer 2

Given:

the random values of x 0, 1, 2, and the mean is 1.2

P(x= 0) = 0.3

To Find:

P(x= 1)

Solution:

 let P(x= 1)= P(x=2)= x

         ⇒ 2x + 0.4 = 1

         ⇒ 2x = 0.6

         ⇒ x = 0.3

mean value = ∑ $^{3_ }$ i=0 $x_{i}p_{i}$

                    = 0(0.4) + 1(0.3) + 2(0.3)

                    = 0.9

Therefore the value of P(x = 1) = 0.9