If a bag has 40 red and blue marbles and a quarter of them are red what is the probability of picking a blue one
1 answer:
Total marbles = 40 & 1/4 (or 0.25) are, then RED = 40x 0.25 = 10
If RED = 10 then BLUE = 30
P(picking one blue) = 30/40 = 3/4 =0.75
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