Mathematics, 14.01.2021 18:40 baseball1525

There are only nred balls and (n + 1) blue balls in a bag, Shamsa takes at random 2 balls from the bag,
Find an expression for the probability that both balls are the same colour,

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There are only nred balls and (n + 1) blue balls in a bag, Shamsa takes at random 2 balls from the...