Probability Stations

The table shows information about the time, t minutes, taken for each of 150 girls to complete an essay.Two girls are chosen at random.

Work out the probability that, to complete the essay,one took 65 minutes or less and the other took more than 100 minutes.

A train stops at station A and then at station B. If the train is late at station A, the probability that it is late at station B is 0.9 . If the train is not late at station A, the probability that it is late at station B is 0.2 . The probability that the train is late at station A is 0.3 . Find the probability that the train is late at one or both of the stations

• 0.44

• 0.42

• 0.66

A gym has 12 exercise stations, including 6 weightlifting benches.

What is the probability that a randomly selected exercise station will be a weightlifting bench?

• 1/2

• 4/5

You spin the above spinner once

What is P(6)

Write your answer as a fraction

• 1/4

• 1/2

On a clothing rack, 3 of 9 shirts are size 2

What is the probability that a randomly selected shirt will be size 2?

• 2/5

• 1/3

Maya puts a quarter into the gumbll machine to get a gumball. The machine has 6 colors- red, pink, blue, yellow, green, purple. What is the theoretical probabilty of maya randomly getting a purple gumball?

• 1/6

• 3/4

Kim surveyed some kids about which pet each one owns

dog: 1

cat: 2

goldfish: 2

bunny: 3

hamster: 5

What is the experimental probability that a randomly selected student owns a hamster

• 3/5

• 1/4

What is sample space?

• A numerical description of how likely something is to happen.

• The set of all possible outcomes in a probibility

What is the probability of spinning blue on the first spinner and pink on the second spinner?

• 8/99

• 1/2

Boats from all along the Atlantic coast were moored at a busy marina one summer day. Of the 20 boats at the marina, 7 were from Ohio

What is the probability that a randomly selected boat will be from Ohio?

• 7/20

• 4/5