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פּוֹפּוּלָרִי Word Problems >

A fair coin is flipped seven times. What is the probability of the coin landing tails up at most five times?

פתרון

A f ai r co in i s f l i pp e d se v e n t im es . Wha t i s t h e p ro babi l i t y o f t h e co in l an d in g t ai l s u p a t m os t f i v e t im es ?

פתרון

\frac{15}{16}

+1

עשרוני

0.9375

צעדי פתרון

Find the probability of not the coin landing tails up at most 5 times:

\frac{1}{16}

Probability of the coin landing tails up at most 5 times

= 1 -

Probability of not the coin landing tails up at most 5 times

= 1 - \frac{1}{16}

1 - \frac{1}{16} = \frac{15}{16}

= \frac{15}{16}

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