00:01
And we are given a binomial distribution with a probability of 4 .5 % and a number of trial of 20.
00:09
So the formula for it is going to be an or choose k times the probability to the n power multiplied by the 1 minus p to the plus binomial formula.
00:30
But since we have a quicker way of solving it, you can use the bin -known pdf function on the ti -i -de -4 -rifice to so forth.
00:42
The number of trial will be 20, probability is 045, and desire x is 2, that is going to give us 0 .168.
00:56
Next one to have probability of x -0 -esm8.
01:00
So we use a binomc known cdf function, c -sampum cumulative.
01:07
And we put in as follows.
01:16
Number trials is 20.
01:18
The probability is 0 .045.
01:22
The number, the x value is 3.
01:25
That's going to give us 0 .9 -89.
01:31
Right, next to go to x...