Probability

Question 1

There are 18 cards in a deck. 12 of them are red and 6 of them are black. What is the probability to get a black card?

Answer 1

1/3

Question 2

What is the probability that you will drink to day

Answer 2

0.9-very likely

Question 3

What is the probability that it is your friends birthday today and you forgot?

Answer 3

0.2- unlikely (unless your forgetful then it could be higher)

Question 4

There are 8 red balls, 6 green balls and 7 blue balls in a bag. Whats the probability of pulling out a blue ball?

Answer 4

(8+6+7)=21
7/21=1/3
Answer=1/3

Question 5

12 there are socks. 3 of them are green. What fraction of them are?

Answer 5

3/12 = 1/4