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Popular Word Problems >

a pair of standard dice are rolled. find the probability of rolling sum of 11 with these dice.

Solution

a p ai r o f s t an d a r d d i ce a re ro ll e d . f in d t h e p ro babi l i t y o f ro ll in g s u m o f 11 w i t h t h ese d i ce .

Solution

\frac{1}{18}

+1

Decimal

0.05555 \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 sum of 11 with these dice:

2

Probability

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

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

\frac{2}{6 ^{2}} = \frac{1}{18}

= \frac{1}{18}

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