Probability – Aptitude MCQ Questions – 12 Posted on July 11, 2020July 11, 2020 by admin Question 1Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them? A. 1/6 B. 5/8 C. 3/8 D. 5/6 Question 2A basket has 5 apples and 4 oranges. Three fruits are picked at random. The probability that at least 2 apples are picked is - A. 25/42 B. 9/20 C. 10/23 D. 41/42 Question 3Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at least 10? A. 1/3 B. 1/6 C. 2/3 D. 5/6 Question 4A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that exactly three bulbs are good. A. 20/31 B. 20/63 C. 5/31 D. 6/31 Question 5The probability that a number selected at random from the first 50 natural numbers is a composite number is - A. 21/25 B. 17/25 C. 4/25 D. 8/25 Question 6A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good. A. 6/63 B. 2/63 C. 125/126 D. 1/126 Question 7If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is - A. 19/52 B. 17/52 C. 5/13 D. 4/13 Question 8Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is - A. 1/2 B. 16/19 C. 4/5 D. 17/20 Question 9A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color? A. 4/9 B. 5/9 C. 7/9 D. 8/9 Question 10A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If four marbles are picked at random, what is the probability that none is blue? A. 17/91 B. 33/91 C. 51/91 D. 65/91