it

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popolare Word Problems >

A coin is flipped three times. What is the probability of getting exactly two heads?

Soluzione

A co in i s f l i pp e d t h ree t im es . Wha t i s t h e p ro babi l i t y o f g e tt in g e x a c tl y tw o h e a d s ?

Soluzione

\frac{3}{8}

+1

Decimale

0.375

Fasi della soluzione

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 exactly 2 heads:

3

Probability

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

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

2^{3} = 8

= \frac{3}{8}

Esempi popolari

Devin and Clare deposited 3,962.00 into a savings account which earns interest compounded continuously. After 1 year, they had 4,487.00 in the account which they used to go on a trip. What was the interest rate on the account?Find the final value if 16500 is invested for 7 years at 9.6% p.a.Zane deposited 3,000 in an account earning 11% interest compounded annually.To the nearest cent, how much will he have in 4 years?The sum of three consecutive integers is minus, 51−51. Find the value of the middle of the three.Two thirds of a number is 16. What is the number?