he

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

פּוֹפּוּלָרִי Word Problems >

Consider a deck of cards. If you draw a single card, what is the probability that you draw a king or a queen

פתרון

C o n s i d er a d ec k o f c a r d s . I f yo u d r a w a s in g l e c a r d, w ha t i s t h e p ro babi l i t y t ha t yo u d r a w a kin g or a q u ee n

פתרון

\frac{2}{13}

+1

עשרוני

0.15384 \dots

צעדי פתרון

Find the probability of you draw a king:

\frac{1}{13}

Find the probability of a queen:

\frac{1}{13}

Since the events are disjoint, Use the formula

P (X_{1} \lor X_{2} \lor \dots \lor X_{k}) = P (X_{1}) + P (X_{2}) + \dots + P (X_{k})

= \frac{1}{13} + \frac{1}{13}

\frac{1}{13} + \frac{1}{13} = \frac{2}{13}

= \frac{2}{13}

דוגמאות פופולריות

The difference between two positive numbers is 21. The larger number is 4 less than 6 times the smaller number. Find the two numbers.Find two consecutive even numbers whose sum is 126 An investor places 20 000 in an account earning 4%p.a. simple interest.Find the value of the investment after 5 years.The sum of two numbers is 16 and their difference is 4. Find the numbers.ten less than four times a certain number is 14. Determine the number