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Phổ biến Word Problems >

A die is rolled twice. Find the probability of getting the same number on both rolls

Lời Giải

A d i e i s ro ll e d tw i ce . F in d t h e p ro babi l i t y o f g e tt in g t h e s am e n u mb er o n b o t h ro ll s

Lời Giải

\frac{1}{6}

+1

Số thập phân

0.16666 \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 the same number on both rolls:

6

Probability

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

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

Triệt tiêu thừa số chung:

6

= \frac{1}{6}

Ví dụ phổ biến

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