Probability, Counting, Permutation, Combination

Question 1

A team of 10 players needs to elect a captain and a cocaptain. What's true about this scenario?

Accepted Answer

It’s a permutation scenario

Question 2

The universal set "U" has 10 elements. A is its subset, and it has 4 elements. Calculate P(A’).

Accepted Answer

6/10

Question 3

What is always true about P(AUA')

Accepted Answer

It is equal to P(Universal Set)

Question 4

1) 7!/3! equals

Accepted Answer

7x6x5x4

Question 5

In a hand of 5 cards, how many different ways can we have hands w/ 4 Red Cards and a Black ace.

Accepted Answer

26C4 x 2C1

Question 6

A and B intersect, what is the formula we have to use to find P(AUB)?

Accepted Answer

P(AUB) = P(A) + P(B) - P(A∩B)

Question 7

CLICK FOR AN EXTRA POINT

Accepted Answer

Don't click here, CLICK HERE!

Question 8

In a hand of 5 cards, Calculate P(ALL BLACK CARDS)

Accepted Answer

0.025

Question 9

Read the question in the image.

Accepted Answer

252

Question 10

How many ways can we arrange the word TESTS?

Accepted Answer

5!/(2!1!2!)

Question 11

Calculate n(All three subjects)

Accepted Answer

5

Question 12

Read the question in the image

Accepted Answer

10

Question 13

A and B are disjoint. A has 3 elements and B has 7 elements. If n(U) = 11, Calculate P(AUB)

Accepted Answer

10/11

Question 14

What is true about permutations?

Accepted Answer

Order does matter

Question 15

A and B intersect at 4 elements. A has 10 elements and B has 12 elements. If AUB = U, Find P(A)

Accepted Answer

.56

Question 16

Calculate the nCr expression 10C3.

Accepted Answer

120

Question 17

TRUE OR FALSE: 110x9! = 11!

Accepted Answer

True

Question 18

Click here for extra points

Accepted Answer

Come on CLICK!

Question 19

P(Math AND Spanish but NOT Chemistry)

Accepted Answer

1.9 %

Question 20

Read the question in the image.

Accepted Answer

4C4 x 4C1

Question 21

How many different ways can we have 5 reps where 3 are firefighters and 2 are policemen?

Accepted Answer

3C3 x 7C2

Questions 21