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A box contains two red balls and four blue balls. A ball ...

A box contains two red balls and four blue balls. A ball is drawn at random from the box and then replaced before a second ball is drawn. Find the probability of drawing two red balls.

A.

23

B.

13

C.

14

D.

19

Correct answer is D

Total number of balls = 2 + 4 = 6

  P(of picking a red ball) = 26 = 13

  P(of picking a blue ball) = 46 = 23

  With replacement,

  P( picking two red balls) = 13 × 13 = 19