The blue M&M was introduced in 1995. Before then, the color mix in a bag of plain M&Ms was (30% Brown, 20% Yellow, 20% Red, 10% Green, 10% Orange, 10% Tan). Afterward it was (24% Blue, 20% Green, 16% Orange, 14% Yellow, 13% Red, 13% Brown). A friend of mine has two bags of M&Ms, and he tells me that one is from 1994 and one from 1996. He won't tell me which is which, but he gives me one M&M from each bag. One is yellow and one is green. What is the probability that the yellow M&M came from the 1994 bag?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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The blue M&M was introduced in 1995. Before then, the color mix in a bag of plain M&Ms was
(30% Brown, 20% Yellow, 20% Red, 10% Green, 10% Orange, 10% Tan). Afterward it was (24%
Blue, 20% Green, 16% Orange, 14% Yellow, 13% Red, 13% Brown). A friend of mine has two
bags of M&Ms, and he tells me that one is from 1994 and one from 1996. He won't tell me which
is which, but he gives me one M&M from each bag. One is yellow and one is green. What is the
probability that the yellow M&M came from the 1994 bag?
Transcribed Image Text:The blue M&M was introduced in 1995. Before then, the color mix in a bag of plain M&Ms was (30% Brown, 20% Yellow, 20% Red, 10% Green, 10% Orange, 10% Tan). Afterward it was (24% Blue, 20% Green, 16% Orange, 14% Yellow, 13% Red, 13% Brown). A friend of mine has two bags of M&Ms, and he tells me that one is from 1994 and one from 1996. He won't tell me which is which, but he gives me one M&M from each bag. One is yellow and one is green. What is the probability that the yellow M&M came from the 1994 bag?
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