A bag contains 5 ruby balls and 7 black balls. Two balls are drawn at random without replacement, and then find the probability of that one is ruby and other is black? 35/66 41/69 36/68 30/60 None of these Option A (First ruby ball is drawn and then black ball is drawn) + (first black ball is drawn and then…
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Two friends A and B appeared for an selection . Let E1 be the event that A is selected and E2 is the event that B is selected. The probability of E1 is 2/5 and that of E2 is 3/7. Find the probability that both of them are selected. 2/35 4/35 6/35 5/35 3/35 Option C Given, E1 be the…
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In how many ways can 3 roses and 4 tulips 2 jasmines can be arranged in a garland such that all roses tied together and all tulips are tied together and jasmines also tied together? 876 864 867 912 834 Option B Required number of ways = 3( 3! * 4! *2!)=3* 3 * 2 * 4* 3 * 2…
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A bag contains 12 white and 18 black balls. Two balls are drawn in succession without replacement. 37/145 35/142 33/141 36/145 31/140 Option D Required probability,=(2/5)×(18/29)=36/145 There are four hotels in a town. If 3 men check into the hotels in a day then what is the probability that each checks into a different hotel? 1/4 2/5 3/8 4/9…
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In a group of 14 boys and x number of girls, the probability of choosing a girl is 3/5. If we have to select two students, find the probability that atleast one of them is boy. 12/17 5/9 10/13 11/17 13/15 Option D Probability of choosing a girl = 3/5 x/(14+x) = 3/5 => x = 21 Required Probability =…
Read MoreA basket contains 8 Blue and 10 Brown balls. There is another basket which contains 6 Blue and 8 Brown balls. One ball is to drawn from either of the two baskets. What is the probability of drawing a Blue ball? 55/126 55/63 37/126 46/63 None Option A Solution: P(choosing 1 basket)=1/2 P(Blue ball from 1st basket)=1/2*8C1/18C1=4/18 P(Blue ball from…
Read MoreProbability Questions for Bank PO Exams – SBI PO, IBPS PO, NIACL, NICL, BoB PO, and other exams  A bag contains 8 apple and 6 orange. Four fruits are drawn out one by one and not replaced. What is the probability that they are alternatively of different fruits? A) 10/143 B) 15/120 C) 20/143 D) 26/110 E) None In an…
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