vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

what is the probability when a card is drawn 9 or 10

Lời Giải

w ha t i s t h e p ro babi l i t y w h e n a c a r d i s d r a w n 9 or 10

Lời Giải

\frac{2}{13}

+1

Số thập phân

0.15384 \dots

Các bước giải pháp

Find the probability of when a card is drawn 9:

\frac{1}{13}

Find the probability of 10:

\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}

Ví dụ phổ biến

Susan is twice as old as Luna. The sum of their ages 4 years ago was 37. Find how old they are now.The sum of five consecutive even integers is 120120. What is the largest integer?Find two consecutive whole numbers that lies between sqrt(53)A merry go round has a circular platform with a đường kính of 2 yards. What is the platform's area?the sum of two numbers is 35. twice the smaller decreased by the larger is 10.