Odds

Question 1

If the probability of a horse Penelope winning a race is 2/7, what are the odds in favour of Penelope winning?

Answer 1

2: (7-2) so 2:5

Question 2

If the probability of picking a pink marble is 3/5, what are the odds against picking a pink marble?

Answer 2

(5-3) : 3 so 2:3

Question 3

If the probability of picking a yellow flower out of a bouquet is 4/5, what are the odds in favour of picking a yellow flower?

Answer 3

4 : (5-4) so 4:1

Question 4

If the probability of rain is 3/10, what are the odds that it will rain?

Answer 4

3 : (10-3) so 3:7

Question 5

If the odds are 2:7 for Penelope to win the race, what is the probability of her winning?

Answer 5

2/ (2+7) so 2/9 = 0.22 or 22%

Question 6

If the odds of picking a blue marble are 3:4, what is the probability of picking a blue marble?

Answer 6

3 / (3+4) = 3/7 = 0.43 or 43%

Question 7

If the odds of picking a white flower out of a bouquet are 1:3, what is the probability of picking a white flower?

Answer 7

1/ (1+3) = 1/4 = 0.25 or 25%

Question 8

If the odds of rain are 7:5, what is the probability of rain?

Answer 8

7 / (7+5) = 7/12 = 0.58 or 58%