from a bag containing 4 black and 5 white balls , a man draws four at random. What are the odds against these being all white

Let event A be getting 4 white balls and let the probability of this event be P(A).So answer to our question will be = 1-P(A)Now, P(A) = C45C49 = 5126So 1-P(A) = 121126

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