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1. We draw a card from a standard deck. What is the probability that it is a Jack, Queen, King, or it is red?

 

2. I have two standard, six-sided dice, one is brown, and the other is black. I roll them both. What is the probabilty that the sum of the number that I roll is less than 4?

 Jun 2, 2021
 #1
avatar+202 
+1

1. There are 52 cards in a standard deck. There are 4 jacks, 4 Queens, and 4 Kings. In addition to this, there are 26 red cards

 

(4+4+4)/2= 6 (because 2 out of the 4 jacks, queens and kings are red)

6+26=32

32/52 is the probability.

You can solve it from here

 

 

2.Total possible number of combinations

6*6=36

 

The number has to be less than 4,

so

1+1

1+2

2+1

1+1

 

 

 

4 combinations 

 

4/36=1/9

 

So the probability is 1/9

 

 

laugh

 Jun 2, 2021
 #3
avatar+202 
+1

Oops i got my second question wrong sorry

mathisopandcool  Jun 2, 2021
 #2
avatar+35061 
+1

26 red cards +  6 black ( J - Q -K)

32 out of 52 = 8/13

 

 

 

 

36 possible rolls

  the rolls that are less than 4

     11

      12

        21         3 out of 36      1/12

 Jun 2, 2021

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