Bag Red
Bag Red
A bag contains red pens and blue pens. You pick two pens without replacing the first one. The probability?
that the first pen is blue is 3/8. The probability of drawing a blue pen and then a red pen is 1/4. Find the probability that
the second pen you pick is red.
Please explain.
first event x second event = probability of first then second
3/8 x R = 1/4
R = 1/4 / 3/8
= 1/4 * 8/3 = 2/3
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