vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến >

An ordinary die is thrown. Find the probability that the number obtained is even or greater than 4?

Lời Giải

An ordinary die is thrown. Find the probability that the number obtained is even or greater than 4?

Lời Giải

\frac{2}{3}

Các bước giải pháp

Find the probability of the number obtained is even:

\frac{1}{2}

Find the probability of greater than 4:

\frac{1}{3}

Find the probability of the number obtained is even and greater than 4:

\frac{1}{6}

Use the Inclusion-Exclusion formula

P (X \lor Y) = P (X) + P (Y) - P (X \land Y)

= \frac{1}{2} + \frac{1}{3} - \frac{1}{6}

\frac{1}{2} + \frac{1}{3} - \frac{1}{6} = \frac{2}{3}

= \frac{2}{3}

Ví dụ phổ biến

The chu vi of a circle is 8pipi ft. Find its radius, in feet.The chu vi of a circle is 14pipi cm. Find its diameter, in centimeters.The sum of a number and its square is 6 . Find the number(s).The bán kính of a circle is 11 ft. Find its area in terms of pipi.Two buses leave towns 1206 kilometers apart at the same time and travel toward each other. One bus travels 15 km/h slower than the other. If they meet in 6 hours, what is the rate of each bus?