4.1
4.2
4.3
4.4
100
A fair dice is thrown. find the probability of scoring a multiple of 2 or a multiple of 3.
4/6 or .6667
100
if one order is selected, find the probability of getting an order from McDonalds, or Wendy’s or an order that’s not accurate.
709/1118 or .634
100
If you roll a fair die 8 times, what is the probability of rolling at least one 6.
1- (.8333)8 = .7674
100
In a horse race, a quinella bet is won if you select the two horses that finish first and second, and they can be selected in any order. The 140th running of the Kentucky Derby had a field of 19 horses. What is the probability of winning a quinella bet if random horse selections are made?
19 nCr 2 = 171
1/171 = .0058
200
a couple wants two children. Find the probability that the first child is male and the second is female.
¼ or .25
200
There are 25 marbles in a bag: 3 yellow, 5 purple, 7 red, 4 green, and 6 blue. find the probability of selecting a yellow first, then a red second, then a blue last with replacement.
126/15625 or .0081
200
Find the probability of randomly selecting a student who spent the money, given that the student received 4 quarters.
27/43 or .628
200
A committee of 5 people needs to be selected from a group of 8 individuals. In how many different ways can the committee be formed if the order in which the members are selected matters?
8 nPr 5 = 6720
300
The probability that the 0817 train from Askington to Birsland sets off on time is 0.92. find the probability that this train is late.
2/25 or .08
300
There are 25 marbles in a bag: 3 yellow, 5 purple, 7 red, 4 green, and 6 blue. find the probability of selecting a red first, then a red second, then a green third, then a purple last without replacement.
840/303600 or .0028
300
if one order is selected, find the probability of getting an order from Wendy’s and Taco Bell given that it is accurate.
394/987 or .3992
300
In a toy store, there are three types of stuffed animals - teddy bears, dinosaurs, and kittens. The store owner has 6 teddy bears, 4 dinosaurs, and 7 kittens in stock. Before the grand opening, the owner arranges these stuffed animals on the shelves. In how many different ways can the owner arrange these stuffed animals if putting the most popular animal in the eyeline of the customer is important?
17!/6!4!7! = 5.9755 x 10^16
400
in a survey of internet users, 3732 respondents say that they use social networking sites and 1380 say they do not use social networking sites. find the probability of randomly selecting a person that does not use social networking sites.
1380/5112 or .27
400
A person throws a fair dice three times. What’s the probability that this person gets a 2 on the first toss and a 6 on the second toss and a 5 on the third toss?
1/216 or .0046
400
You buy 12 lottery tickets. You have a 5% chance of winning on a single lottery ticket. find the probability that you will have at least one winning ticket among the 12 you bought.
1- (.95)12 = .4596
400
If radio station call letters must begin with either K or W and must include either two or three additional letters, how many different possibilities are there?
26 nCr 2 + 26 nCr 3 = 2925