00:01
Hello students, in this question we have to find out the missing probability and also the expectation value.
00:07
So here we add all the probability values.
00:11
So it is equal to 0 .95.
00:14
So to find out the missing probability value, we subtract the total value from 1.
00:20
So because we know that the sum of probability value is equal to 1.
00:26
That's why we subtract the total value from 1.
00:29
We get 0 .05 as missing probability.
00:33
So here the expectation of x formula is summation x into p of x.
00:39
So it is equal to 0 plus 0 .12 plus 0 .68 plus 0 .21 plus 0 .2.
00:45
Expectation of x equal to 1 .21.
00:49
And now we have to find out the standard deviation.
00:53
So here the standard deviation formula is square root of pi into x minus mu whole square.
01:03
So this is the formula...