00:01
In this problem, we need to compute the probability of x successes in the n -independent trials of a binomial probability experiment.
00:08
Now, we need to find the probability of the number of successes being less than 5.
00:13
So the number of successes will be 0 or 1 or 2 or 3 or 4.
00:20
And since all of these outcomes are disjoint using the addition law of probability, this will be p0 plus p1 plus p2, plus p3, plus p1.
00:30
Now you use the formula for the probability of x successes in a binomial probability experiment.
00:37
So first we have ncx, that will be 10c0, times p, so that's 0 .65 to the power x, so that will be 0 times 1 minus p, so 1 minus 0 .65, which is 0 .35 to the power n minus x, so that is 10 minus 0, so this will just be 10 .7.
00:55
Similarly, p1 will be 10c1, 0 .65 to the power 1, 0 .6, 0 .35 to the power 9...