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March 31st, 2017, 04:35 AM  #1 
Newbie Joined: Mar 2017 From: UK Posts: 5 Thanks: 0  Probability Help Please
My daughter has this revision question and I can't help her with it. Anybody able to show me the working out required please so I can go through it with her. When a bunny and a chick have a race, the probability that the bunny wins is 0.9. When a bunny and a chick have a jumping competition, the probability that the chick wins is 0.3. If a bunny and a chick have a race and then a jumping competition, what is the probability that they will each win exactly one of the competitions? 
March 31st, 2017, 06:43 AM  #2 
Newbie Joined: Mar 2017 From: UK Posts: 3 Thanks: 1 
The probability of the bunny winning the race AND the jumping is 0.9 x 0.7 = 0.63 which is 63%. and the probability of the chick winning the race AND the jumping is 0.1 x 0.3 = 0.3 which is 30%. Showing this to your daughter on a tree diagram might help her to see it. 

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