Probability Combinations

What is the probability of getting any letter that is not A?

• 6/8

• 3/4

• 2/8

• 1/4

A box contains 3 black pens, 7 blue pens, and 5 red pens. Without looking, P(red or black)

• 8/15

• 15/225

• 5/15

• 3/15

Permutation or Combination: A group of 14 people need to take an elevator to the top floor. They will go in groups of seven. They are deciding who will take the elevator on its second trip.

• permutation

• combination

Sam is fishing in a new catch and release pond that was just stocked with 32 bluegill, 49 catfish, 27 bass, and 12 carp. He catches a fish, releases it, then catches another. What is the probability that he caught a bluegill, then a carp? 

• 5/24

• 11/30

• 2/75

• 7/60

Jacob's piggy bank has 18 quarters, 20 dimes, 24 nickels, and 43 pennies. He chooses a coin, does not replace it, then chooses another. What is the probability that he chose a dime then a nickel?

• 9/52

• 4/91

• 44/105

• 11/26

Based on the chart, what is the experimental probability of pulling a green marble?

• 1/8

• 8/25

• 8/100

• 7/8

Permutation or Combination: Jaidee and Amy are planning trips to four countries this year. There are 6 countries they would like to visit. They are deciding which countries to skip.

• permutation

• combination

Jim draws 4 cards from a deck of cards. What is the probability of all 4 cards being the same suit?

• 715

• 6,497,400

• 68,640

• 2,860

Tree diagrams are useful because...

• they are cool to draw.

• they show you pictures of the food.

• they show you all possible outcomes.

• they only show you the best choices.

Student council has 24 members.  In how many different ways can a president, vice-president, treasurer, historian, and secretary be selected?  

• 5,100,480

• 0

• 42,504

• 5.17 x 10²¹