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פּוֹפּוּלָרִי Word Problems >

Two fair dice are rolled and the possibilities are below. Find the probability that the sum is not 9. Leave probability as fraction and reduce.

פתרון

Tw o f ai r d i ce a re ro ll e d an d t h e p oss ibi l i t i es a re b e l o w . F in d t h e p ro babi l i t y t ha t t h e s u m i s n o t 9. L e a v e p ro babi l i t y a s f r a c t i o n an d re d u ce .

פתרון

\frac{8}{9}

+1

עשרוני

0.88888 \dots

צעדי פתרון

Find the probability of the sum is 9;.:

\frac{1}{9}

Probability of the sum is not 9;.

= 1 -

Probability of the sum is 9;.

= 1 - \frac{1}{9}

1 - \frac{1}{9} = \frac{8}{9}

= \frac{8}{9}

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