self Maths Puzzle

from the pack of 52 cards ,three cards r drawn at random,find the probability of drawing a king,a queen and jack

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self Other Question

A bag contains five balls,3 red and 2 white.balls are removed one at a time(without replacement) till all red balls are removed or all white balls are removed.What is the probability that the last ball removed is white? find no. of 3 digit integers whose sum of digits is 16