+0  
 
0
12
3
avatar

A deck of cards has  cards,  red cards numbered - and  blue cards numbered -

 



Suppose we shuffle the deck and draw the top two cards. What is the probability that they have the same number?

 

I would appreciated if you showed me how you did it!!

 May 13, 2023
 #1
avatar
0

 

The probability that the first card has a certain number is 2/20​. The probability that the second card has the same number is 1/19​. Therefore, the probability that the first two cards have the same number is 2/20​×1/19​ = 1/190​​.

 May 13, 2023
 #2
avatar
0

The probability of drawing ANY number is 100% or 20 / 20

 

The probability of the 2nd number matching the first number is: 1 / 19

 

Therefore, the probability of the cards matching is: 20/20 * 1/19 = 1/19 =~5.26%

 May 13, 2023
 #3
avatar
0

Oh, thank you so much! I understand now!

 May 17, 2023

6 Online Users

avatar
avatar
avatar