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Phổ biến Word Problems >

If two dice are rolled, what is the probability of getting a sum of 9?

Lời Giải

I f tw o d i ce a re ro ll e d, w ha t i s t h e p ro babi l i t y o f g e tt in g a s u m o f 9 ?

Lời Giải

\frac{1}{9}

+1

Số thập phân

0.11111 \dots

Các bước giải pháp

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 getting a sum of 9:

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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