00:01
Hello students, according to the given question we have to find out mean, variance and standard deviation values.
00:08
So, in question 11 it was given the x and probability of x values.
00:16
So, now we have to find expectation of x that is equal to summation x into probability of x.
00:23
So, from the given data it is 9 into 0 .37 plus 4 into 0 .12 plus 2 .4 into 0 .10 plus 2 into 0 .11 plus 4 .2 into 0 .30.
00:43
So, which is equal to 5 .5.
00:46
So, from given options the correct answer is option a.
00:50
Now, in question 12 to find expectation of x square that is equal to summation x square into p of x.
00:59
So, according to above procedure we get 9 square into 0 .37 plus 4 square into 0 .12 plus 2 .4 into 0 .10 plus 2 square into 0 .11 plus 4 .2 square into 0 .30...