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Please Help!!!!!!!

Janet is going to draw a marble from the bag shown below, replace it, and then draw another marble. What is the
probability that Janet will get a blue or yellow marble on the first draw and a pink on the second draw?
(3 green, 4 yellow, 5 blue, 8 pink)
7/50
9/50
17/40

User CyanAngel
by
8.0k points

1 Answer

2 votes

(Answer:

P(Bl or Yl) = 45%

(Pk on 2nd draw) = 18%

Explanation:

There are a total of 20 marbles (3 + 4 + 5 + 8) in the bag. Since each marble is replaced once drawn, there is no change in the total count from one draw to another (unconditional probability).

So

P(Bl or Yl) = (5 + 4)/20 = 9/20 = .45 = 45%

Then

P(Pk on 2nd draw) = P(1st draw) * P(2nd draw)

= 9/20 * 8/20 = 72/400 = 9/50 = .18 = 18%

User Alexey Borovikov
by
8.2k points

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