Two coins are flipped. What is the probability that both coins land on heads?

解

Tw o co in s a re f l i pp e d . Wha t i s t h e p ro babi l i t y t ha t b o t h co in s l an d o n h e a d s ?

\frac{1}{4}

十進法表記

0.25

解答ステップ

The possible outcomes when a coin is thrown two times are

2 \cdot 2

Therefore, the number of possible outcomes:

2^{2}

Find the number of favorable outcomes of both coins land on heads:

1

Probability

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

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

2^{2} = 4

= \frac{1}{4}