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Phổ biến Word Problems >

a coin is tossed 3 times. what is the probability of getting 3 tails up

Lời Giải

a co in i s t osse d 3 t im es . w ha t i s t h e p ro babi l i t y o f g e tt in g 3 t ai l s u p

Lời Giải

\frac{1}{8}

+1

Số thập phân

0.125

Các bước giải pháp

The possible outcomes when a coin is thrown three times are

2 \cdot 2 \cdot 2

Therefore, the number of possible outcomes:

2^{3}

Find the number of favorable outcomes of getting 3 tails up:

1

Probability

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

= \frac{1}{2 ^{3}}

2^{3} = 8

= \frac{1}{8}

Ví dụ phổ biến

he sentence into algebraic symbols.:The product of a number x and six decreased by fifteen is three.If 535 is invested at an interest rate of 7% per year and is compounded continuously, how much will the investment be worth in 15 years?A third of a number increased my 10 is 13 The sum of 4 consecutive integers is 354 .one number is twice the value of another number. their sum is 96. find the numbers