math (check answer plz)

7. A bag containing 4 green marbles, 6 red marbles, 14 orange marbles, 5 brown marbles, and 8 blue marbles. You choose a marble, replace it, and choose again. What is P(red, then blue)?

A. 48/1369
B. 14/1369
C. 27/37
D. 14/37***?

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asked by Me
  1. 37 marbles?
    first draw (red)
    6/37

    second time (independent because you replaced the marble and still have 37

    blue
    8/37

    so
    6/37 * 8/37 = 48/1369

    You multiply to get probability of two independent events both happening, you add if two things satisfy your condition such as if they asked what is probability of getting EITHER a red or a blue on the first draw.

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    posted by Damon
  2. ohhhh i get it! thank you!!

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    posted by Me

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