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Popular Word Problems >

What is the probability of rolling a sum of 9 when two dice are tossed?

Solution

Wha t i s t h e p ro babi l i t y o f ro ll in g a s u m o f 9 w h e n tw o d i ce a re t osse d ?

Solution

\frac{1}{9}

+1

Decimal

0.11111 \dots

Solution steps

The possible outcomes when two dice are rolled are

6 \cdot 6

Therefore, the number of possible outcomes:

6^{2}

Find the number of favorable outcomes of rolling a sum of 9 when 2 dice are tossed:

4

Probability

= \frac{number of favorable outcomes}{total number of outcomes}

= \frac{4}{6 ^{2}}

\frac{4}{6 ^{2}} = \frac{1}{9}

= \frac{1}{9}

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