A bag contains two red balls and five blue balls. You draw out a ball, record its color, replace it, and then draw out a second ball. What is the probability that you draw out a red ball AT LEAST once?

Question

kianna0098 · Answer

A:  0.28
B:  0.49
C: 0.71
D: is crossed out

whpalmer4 · Answer

what is the probability on each draw of drawing a ball which is NOT a red ball?

whpalmer4 · Answer

Take that probability, then find the probability of doing that twice in a row.  This is the probability of not drawing any red balls.  Subtract that probability from 1 (a certainty, the set of all possibilities), and you have the probability you seek.

triciaal · Answer

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