A brother and sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5th and that of the sister’s selections is 1/3rd. What is the probability that one of them is selected ? By Editor No Comment Answer : B. 2/5
A bag contains 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white ? By Editor No Comment Answer : D. 5/39
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ? By Editor No Comment Answer : D. 9/20...
A bag contains 4 black, 5 yellow and 6 green balls. Three balls are drawn at random from the bag. What is the probability that all of them are yellow ? By Editor No Comment Answer : A. 2/91
When two dice are tossed, What is the probability that the total score is a prime number ? By Editor No Comment Answer : D. 5/12
