00:01
So our question says that 26 % of college students say they use credit cards because of the rewards program.
00:05
You randomly select 10 college students and ask each of them to name the reason he or she uses the credit card.
00:11
So find the probability that the number of college students who say they use credit cards because of the reward problem is question 1, exactly 2, question 2, more than 2, and question 3, between 2 and 5 inclusive.
00:25
So our probability of success p is actually cost to 26%, which is actually cost to 26%, which is actually cost to 0 .26 and our sample size or the number of trials n we have that to be equals to 10.
00:36
So this question of ask can actually be modelled with a binomial distribution.
00:44
So first and first, the first question says a probability that x is exactly equals to two.
00:49
So i will be using a calculator to get on this detail.
00:52
So probability that x is equal to two.
00:55
So here is my calculator.
00:57
Let's take a zoom in.
00:59
All right.
00:59
So probability of success is a 0 .3.
01:01
2, 6.
01:03
The number of trials, according to the question, we have that to be equal to 10.
01:08
So we have this to be across to 10.
01:11
Excuse me...