Question

A bag contains 3 red 4 white and 5 green balls. three balls are selected at without replacement. find the probability that the three balls chosen are a) all red b) all green c) one of each colour if the selection of the three balls was carried out 1100 times, how often would you expect to choose d) three red balls e) one of each colour

Answer 1

Answer:

Total number of balls are 12, 3 red, 4 white, and 5 green balls

i) three balls were choosen randomly

a) probability of all of them being red = number of red balls / total number of red balls = 3/12 =1/4

b) all green = 5/12