ATQ, Total number of balls in the bag =7+ 28 + 10 = 45 Probability of selecting 1 blue ball out of all the balls, P(E1) = (7/45) Probability of selecting 1 green ball out of all the balls, P(E2) = (10/45) The probability of drawing either blue ball or green ball = , P(E1) + P(E2) = (7/45) + (10/45) = (17/45)
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