Probability and Relative Frequency

A ball is chosen at random from a bag containing three different colours: pink, orange, and white. If P(pink) = 1/3, and P(orange) is 1/5, what is P(white)?

• 2/8

• 6/8

• 8/15

• 7/15

A ball is chosen at random from a bag containing three different colours: pink, orange, and white. If P(pink) = 1/3, and P(orange) is 1/5, what is P(not white, and not orange)?

• 1/3 or 5/15

• 2/3 or 10/15

• 7/15

• 8/15

A couple is planning to have 22 children. How many of their 22 children will be expected to be boys?

• 22

• 1/2

• 11

• 0.5

A die is tossed 60 times. What is the expected frequency of throwing a 6?

• 1/6 or 10/60

• 1

• 6

• 10

A die is tossed 60 times. What is the expected frequency of throwing an even number greater than 2?

• 20

• 2

• 30

• 10

There is a 0.14 chance of rain each day in Sunshine Valley. How many rainy days are to be expected over the next 460 days?

• 0

• 14

• 7/230 or 14/460

• 69

There are 300 families with three children. How many of these families are expected to have 3 boys?

• 150

• 37.5

• 100

• can't say

What is the relative frequency (to the nearest percent) of boys among those who cannot bike to school? 

• 4%

• 14%

• 13%

• 29%

What is the relative frequency of people that purchased no food?

• 10%

• 60%

• 15%

• 30%

What is the relative frequency of hamsters? (round to nearest tenth)

• 14.3%

• 4%

• 0.1%

• 25%