Mid Unit Review 11

What is a permutation?

There may be multiple correct answers

• Arrangement of items where order does NOT matter

• Arrangement of items where order does matter

What is a combination?

There may be multiple correct answers

• Arrangement of items where order does NOT matter

• Arrangement of items where order does matter

There are 8 candidates for 2 positions. How many ways can the positions be filled?

Answer explanation

Since order doesn't matter, this would be a combination

There are positions A, B, C, D open for a job and 14 candidates. In how many ways can the jobs be awarded in this order?

Answer explanation

Since order does matter, this would be a permutation

A spinner with 6 equal sections is used.

What is the theoretical probability of spinning an odd number?

• 1/6

• 3/6

• 1/3

• 1/2

Answer explanation

There are 3 odd numbers. 3/6=1/2

A target is 24 inches by 22 inches and the center

target is 5 inches by 3 inches.

What is the probability the ball will hit the center target?

What is the probability of independent events?

• P(A and B)= P(A)P(B)

• P(A and B)= P(A) + P(B)

• P(A and B)= P(A) - P(B)

• P(A and B)= P(A)/P(B)

There are 6 blue and 5 red cards in one pile and there are 7 white and 8 black cards in another pile.

What is the probability of selecting a blue and a black card?

What is the equation for Conditional Probability?

A promotion has a 3% chance of awarding a prize. Suppose you have 9 cards.

What is the probability as a percent that 1 card is a winner?

• 21.2%

• 3%

• 15%

• 12.1%