The odds against an event are 7 : 2. What is its probability?

\frac{2}{9}

Correct answerYour answer

\frac{2}{7}

Correct answerYour answer

\frac{1}{3}

Correct answerYour answer

\frac{7}{9}

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

Odds against 7 : 2 mean 7 unfavourable cases for every 2 favourable ones, 9 in all.
So the probability that it happens is $\frac{2}{9}$ .

Worth noting

$\frac{7}{9}$ is the probability that it does not happen.

Ten questions from Probability, at your own pace.

Ten questions from Probability, at your own pace.

Explanation