00:01
In this question we are given that a random variable, random variable, x has expected value e of x, which is given as 3 and variance of x is given to us as 1.
00:25
So for the first part of the question we need to find here are value for e of x plus water.
00:35
So let's calculate this.
00:37
This will be as e of x added by 1.
00:43
So our value for your expected value of x is 3.
00:47
So 3 plus 1 this will be equal to 4.
00:51
So our answer for part a will be as e x plus 1.
01:01
Expected value of x plus 1 will be equal to 4.
01:05
So this is the solution of part in here.
01:08
Now let's see our second part of it.
01:11
Here in part b you have to find our value for expected value of x squared.
01:21
So expected value of x is square can be find it from by using the variance formula.
01:26
So we will write here variance of x is equal to expected value of x squared minus expected value of x squared minus expected value of x squared.
01:41
To the whole school.
01:43
So variance is given us as 1 and here we need to find this value so we will write down as it is minus we have just find it as 3 so here we will put 3 to the whole square and then 1 is equal to expected value of x square minus 9 so our value for answer for x squared expected value of x square will be 9 plus 1 that is 10.
02:20
So here we have our answer for p part...