ar

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

شائع Word Problems >

Calculate the probability of a card that was a heart or spade

الحلّ

C a l c u l a t e t h e p ro babi l i t y o f a c a r d t ha t w a s a h e a r t or s p a d e

الحلّ

\frac{1}{2}

+1

عشري

0.5

خطوات الحلّ

Find the probability of a card that was a heart:

\frac{1}{4}

Find the probability of spade:

\frac{1}{4}

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}{4} + \frac{1}{4}

\frac{1}{4} + \frac{1}{4} = \frac{1}{2}

= \frac{1}{2}

أمثلة شائعة

Austin invested 200 in an account paying an interest rate of 6.1% compounded quarterly. Assuming no deposits or withdrawals are made, how much money, to the nearest ten dollars, would be in the account after 15 years?Matmat is playing a card game together with his friends as their activity during their leisure time. He was stuck in a win or lose situation. When he draws a card from the standard deck of cards, what is the probability of getting an odd number that is less than 10, but greater than 3 or a black?Lauren's age is half of Joe's age. Emma is four years older than Joe. The sum of Lauren, Emma, and:Joe's age is 34. How old is Joe?The radius of a circle is 9 m. Find its area to the nearest whole number.Hakeem is going to invest in an account paying an interest rate of 3.5% compounded continuously. How much would Hakeem need to invest, to the nearest hundred dollars, for the value of the account to reach 3,700 in 15 years?