en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular Word Problems >

What is the probability that we get the head at least two times when we toss a coin three times?

Solution

Wha t i s t h e p ro babi l i t y t ha t w e g e t t h e h e a d a t l e a s t tw o t im es w h e n w e t oss a co in t h ree t im es ?

Solution

\frac{1}{2}

+1

Decimal

0.5

Solution steps

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 we get the head at least 2 times:

4

Probability

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

= \frac{4}{2 ^{3}}

\frac{4}{2 ^{3}} = \frac{1}{2}

= \frac{1}{2}

Popular Examples

a number increased by 2 8000 for 4 years at 6.5% compounded monthly. what is the amount of interest?a number increased by 9 Andy is 3/4 as old as Mitchell. Four years ago, Andy was 2/3 as old as Mitchell. How old is each?Isaac opened a savings account and deposited 500.00. The account earns 1% interest, compounded annually. If he wants to use the money to buy a new bicycle in 3 years, how much will he be able to spend on the bike?