Probability – Aptitude MCQ Questions – 05 Posted on July 11, 2020July 11, 2020 by admin Question 1A basket contains 6 blue, 2 red,4 green and 3 yellow balls. If four balls are picked up at random, what is the probability that 2 are red 2 are green? A. 4/15 B. 5/27 C. 1/3 D. 2/445 Question 2Two dice are tossed. The probability that the total score is a prime number is- A. 1/6 B. 1/2 C. 5/12 D. 7/9 Question 3A speaks truth in 60% cases B speaks truth in 70% cases. The probability that they will way say the same thing while describing a single event, is- A. 0.54 B. 0.56 C. 0.68 D. 0.94 Question 4In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that the selected students are 2 boys and 1 girls, is: A. 21/46 B. 25/117 C. 1/50 D. 3/25 Question 5An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If four marbles are picked up at random, what is the probability that 1 Is green, 2 are blue and 1 is red ? A. 1335 B. 24/455 C. 11/15 D. 1/13 Question 6A box contains 10 black and 10 white balls. What is the probability of drawing 2 balls of the same colour ? A. 9/19 B. 9/38 C. 10/19 D. 5/19 Question 7From a pack of 52 cards, one card is drawn at random. What is the probability that the card drawn is a ten or a spade? A. 4/13 B. 1/4 C. 1/13 D. 1/26 Question 8An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are drawn at random, find the probability that no ball is blue. A. 5/7 B. 10/21 C. 2/7 D. 11/21 Question 9A bag contains 10 mangoes out of which 4 are rotten, two mangoes are taken out together. If one of them is found to be good, the probability that other also good is- A. 1/3 B. 8/15 C. 5/18 D. 2/3 Question 10Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even ? A. 1/2 B. 3/4 C. 3/8 D. 5/16