# Tag Archives: Probability

Given an NxN chessboard and a Knight at position (x,y). The Knight has to take exactly K steps, where at each step it chooses any… Read More
A box contains 5 green, 4 yellow and 3 white balls. Three balls are drawn at random. What is the probability that they are not… Read More
Two cards are drawn together from a pack of 52 cards. What is the probability that one is a spade and one is a heart?… Read More
From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings? (A) 1/15… Read More
Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even? (A) 7/9 (B) 5/8 (C) 3/4 (D) 1/2… Read More
What is the probability of getting a sum of 9 from two throws of a dice? (A) 1/3 (B) 1/6 (C) 1/9 (D) 1/12 Answer:… Read More
Recently DirectI visited our campus for placements for three profiles – 1. Platform Engineer 2. Applications Engineer 3. Operations Engineer This process is for the… Read More
Ram speaks truth in 3/4 of cases and Shyam in 4/5 of cases. In what percent of cases while narrating the same event are they… Read More
A box having 5 black and 3 brown flags. Another box having 4 black and 6 brown flags. If one flag is drawn from each… Read More
A 5 digit number is formed by using digits 1, 2, 3, 4 and 5 with no two digits same. What is the probability that… Read More
A bag contains 21 balls numbered 1 to 21. two balls are drawn one after another without replacement. Find the probability that both balls are… Read More
What is the probability that a number selected from numbers [1,30] is prime number? (A) 1/3 (B) 2/7 (C) 5/9 (D) 5/30 Answer: (A) Explanation:… Read More
An urn contains 12 red and 18 white marbles. Two marbles are drawn without replacement one after another. What is the probability that first is… Read More
4 dices are thrown simultaneously. What is the probability that all the dices show the same number. (A) 1/216 (B) 1/36 (C) 4/216 (D) 4/36… Read More
A box contains 6 black, 5 brown and 2 yellow balls. If 2 balls are selected at random, what is the probability that both are… Read More