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.
23
13
14
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