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High School
Calculus and Analysis
Precalculus
Probability and combinatorics

Recent questions in Probability and combinatorics

Nann 2021-09-06

Your manager will assign her 9 employees to three tasks, 2 to task A, 4 to task B, and 3 to task C. If she randomly assigns employees to tasks, what is the probability that you and your best friend will be the two assigned to task A?

kuCAu 2021-09-06

Suppose $E (X) = 5$ and $E [X (X - 1)] = 27.5,$ find $\in (x^{2})$ and the variance.

jernplate8 2021-09-06

The following day 4 drink samples are add and customers are told that they can take 4 pastries samples and 2 drink samples. How many different selections does the customer now make?

babeeb0oL 2021-09-06

12 samples of different pastries are on display as customers leave a bakery, they are told that they can choose any 5 samples. How many different selections can a customer make?

boitshupoO 2021-09-05

55 athletes are running race. A gold medal is to be given to the winer, a silver medal is to be given to the second-place finisher, and bronze medal is to be given to the third-place finisher. Asume that there are no ties. In how many possible ways can the 3 medals be distributed

sanuluy 2021-09-05

A dresser drawer contains one pair of socks with each of the following colors: blue, brown, red, white and black. Each pair is folded together in a matching set. You reach into the sock drawer and choose a pair of socks without looking. You replace this pair and then choose another pair of socks. What is the probability that you will choose the red pair of socks both times?

Sinead Mcgee 2021-09-04

Consider all four-digit numbers that can be created from the digits 0-9 where the first and last digits must be even and no digit can repeat. Assume that numbers can start with 0. What is the probability of choosing a random number that starts with 8 from this group? Enter a fraction or round your answer to 4 decimal places, if necessary.

hexacordoK 2021-09-03

When an experiment is performed, one and only one of the events $A_{1}, A_{2}$ and $A_{3}$ will occur. Find $P (A_{1}), P (A_{2})$ and $P (A_{3})$ under each of the following assumptions: a) $P (A_{1}) = P (A_{2}) = P (A_{3})$
b) $P (A_{1}) = P (A_{2}) and P (A_{3}) = \frac{1}{2}$
c) $P (A_{1}) = 2 P (A_{2}) = 3 P (A_{3})$

Nann 2021-09-03

Suppose a class consists of 3 students majoring in Mathematics, 4 students majoring in Chemistry and 4 students majoring in Computer Science. How many arrangements are possible for forming a group of 3 students, if each group should consist at least 2 students majoring in chemistry?

aortiH 2021-09-02

The probability that an event will happen is $P (E) = \frac{24}{29}$ . Find the probability that the event will not happen

Lennie Carroll 2021-09-01

Police response time to an emergency call is the difference between the times the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. over a long period of time it has been determined that the police responce time has a normal distribution with a mean of 8.4 minutes and a standard deviation of 1.7 minutes. for a randomly recieved emegency call, what is the probability that the response time will be:
a) between 5 and 10 min
b) less than 5 min
c) more than 10 min

CMIIh 2021-09-01

A company has 34 salespeople. A board member at the company asks for a list of the top 5 salespeople, ranked in order of effectiveness. How many such rankings are possible?

Wierzycaz 2021-08-19

What does it mean for an event to be unusual? Why should the cutoff for identifying unusual events not always be 0.05?

cistG 2021-08-15

An urn contains 5 white and 10 black balls. A fair die is rolled and that number of balls is randomly chosen from the urn. What is the probability that all of the balls selected are white? What is the conditional probability that the die landed on 3 if all the balls selected are white?

vestirme4 2021-07-03

${(- 3 j^{- 5} \cdot k^{6})}^{4}$

Trent Carpenter 2021-07-01

Pure acid is to be added to a $20 %$ acid solution to obtain 28 L of a $40 %$ acid solution. What amounts of each should be used?

he298c 2021-06-24

Sleep: Mean 7.35 and Range $5.5 - 8.8$
Light physical activity: Mean 8.71 and Range $3.0 - 16.0$
Moderate physical activity: Mean 3.36 and Range $0.71 - 8.3$
Hard physical activity: Mean 0.78 and Range $0 - 4.1$
Very hard physical activity: Mean 0.14 and Range $0 - 1.05$
On the average. how many hours per day did the women sleep?

usagirl007A 2021-06-19

Take two cards from a deck without replacement. What is the probability of getting a red queen and then another red card?

Even though it is always placed into the field of Precalculus, probability and combinatorics problems are more related to analytics and statistical information that many students implement as they are working with the accuracy of their research data. It is one of the reasons why finding good probability combinatorics examples is both complex and not. It is good to have a look through probability combinatorics questions as these will provide you with the answers and help understand how equations work and why possible outcomes are vital for understanding how the calculation takes place.

Precalculus