A bag contains 4 Milky Way bars and 5 Snickers bars. Jerod picks a bar at random from the bag and replaces it back in the bag. He mixes the bars in the bag and then picks another bar at random. Construct a probability tree and calculate the probability that Je

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A bag contains 4 Milky Way bars and 5 Snickers bars. Jerod picks a bar at random from the bag and replaces it back in the bag. He mixes the bars in the bag and then picks another bar at random. Construct a probability tree and calculate the probability that Jerod picks a Milky Way bar in his second draw.
Expert Solution
Step 1

Given information:

A bag contains 4 Milky Way bars and 5 snickers bars.

Total number of bars is 4+5=9.

A bar is selected from the bag with replacement.

That is, the selection of bars are independent.

P(milky way bar)=4/9

P(snicker)=5/9

 

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