Probability Venn Tree

How many senior boys play football but do not wrestle?

• 9

• 12

• 18

• 104

How many senior boys play football or wrestle?

• 9

• 21

• 30

• 39

A box contains 3 brand A batteries and 7 brand B batteries. 30% of brand A batteries are faulty and 40% of brand B batteries are faulty. A battery is selected at random and then checked to see if it is faulty. What is the probability that a not faulty brand A battery is selected?

• 0.21

• 0.09

• 0.28

• 0.25

What is the probability that the person picked will be a boy given they speak german? 

• .7273

• .4

• .16

• .22

What is the probability the dessert has peanut butter in it?

• 0.84

• 0.58

• 0.22

• 0.59

What is the probability that the dessert doesn't have peanut butter in it?

• 16

• 0.41

• 0.38

• 0.78

P (brownies  l  no peanut butter)

• 0.12

• 0.88

• 0.05

• 0.58

The diagram shows the sports played by 80 students.

If a student is picked at random, what is the probability that they play football?

• ⁶⁶/₈₀

• ⁴/₈₀

• ¹⁸/₈₀

• ⁴⁹/₈₀

What is a sample space?

• The answer to a probability problem.

• The area or perimeter of a probability.

• The total number of different results (or outcomes) you could get from an experiment.

• A probability that is always written as a percent.

At Bob’s Burger Shop, you can order a burger with your choice of fries or salad and a soda or juice. The diagram below show the orders taken of one day. Using the tree diagram, how many orders were take in one day?