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פּוֹפּוּלָרִי Word Problems >

a fair coin is flipped 10 times. What is the probability that exactly 4 of the 10 flips come up heads?

פתרון

a f ai r co in i s f l i pp e d 10 t im es . Wha t i s t h e p ro babi l i t y t ha t e x a c tl y 4 o f t h e 10 f l i p s co m e u p h e a d s ?

פתרון

\frac{1}{2}

+1

עשרוני

0.5

צעדי פתרון

The possible outcomes when \mathrm{a coin is thrown} is

{H, T} .

Therefore, the number of possible outcomes:

2

The number of favorable outcomes of \mathrm{exactly 4 of the 10 flips come up heads}:

1

Probability

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

= \frac{1}{2}

דוגמאות פופולריות

The sum of twice a number and 4 is 1 a circle's diameter is 10m what is radius Tim opened a savings account and deposited 300.00 as principal. The account earns 5% interest, compounded monthly. How much interest will he earn after 3 years?56% of what number is 35 Terry deposits a principal amount of 500 in a savings account that earns an annual rate of simple interest. If he makes no deposits or withdrawals, he will earn 40 in simple interest in 4 years. What is the annual rate of simple interest?