00:01
Hey there, welcome to numerade.
00:03
We are looking at a basketball player here in exercise 9, and we're asked to find the expected number of shots until he misses.
00:13
So what we have here is that a basketball player has made 80 % of the foul shots.
00:20
So the probability here is 0 .80.
00:24
All right.
00:28
So these shots are independent.
00:29
So what would be the expected number of shots until he misses? so what we have here, we would need to know how many shots we would have.
00:44
So how we would set this up is basically the expected value, e of x, equaling the inverse, because this probability here is 0 .80.
01:00
So we're going to take 1 divided by 1 minus 0 .8 in which this will equal 1 minus 1 divided by 0 .2.
01:18
All right, so we're looking at 1 divided by 0 .2, which basically we know this equals 5 shots.
01:28
So our estimated value here is 5 shots...