Probability: Events, Outcomes and the Basic Formula, Quiz

A fair die is rolled. What is the probability of getting a number less than

3

?

A

\displaystyle \dfrac{2}{3}

B

\displaystyle \dfrac{1}{3}

C

\displaystyle \dfrac{1}{2}

D

\displaystyle \dfrac{1}{6}

A bag has

5

red,

3

blue and

2

white balls. One is drawn at random. What is

P(\text{blue})

?

A

\displaystyle \dfrac{3}{10}

B

\displaystyle \dfrac{1}{3}

C

\displaystyle \dfrac{3}{7}

D

\displaystyle \dfrac{3}{5}

The probability that a bus is late is

0.15

. What is the probability that it is not late?

A

1.15

B

0.75

C

0.85

D

0.15

Which of these cannot be a probability?

A

\displaystyle \dfrac{7}{5}

B

1

C

0

D

0.99

A die is rolled. What is the probability of getting

7

?

A

\displaystyle \dfrac{1}{6}

B

\displaystyle \dfrac{1}{7}

C

0

D

1

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