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A bag contains 4 red balls, 5 green balls and 6 yellow balls. Two balls are drawn at random from this bag. What is the probability that exactly one of the balls is yellow in colour?
correct answer:-2
A card is drawn from a pack of 100 cards numbered 1 to 100. Find the probability of drawing a number which is square?
correct answer:-4
5 red, 4 blue and 3 green balls are kept in bag. Two balls are drawn at random from the bag. What is the probability that none of the two balls drawn is red in color?
correct answer:-4
Find the number of ways of arranging the letters of the word IMPORTANT such that "IMP" are always together in any order.
correct answer:-3
A bag contains some yellow marbles, red marbles and green marbles. The probability of drawing a green marble from the box is $$\frac{1}{5}$$. There are twice as many yellow marbles as green marble. The number of red marbles in the box are 10.
What is the total number of marbles in the box?
correct answer:-4
Ajit, Ravi and Hari were trying to hit a target. If Ajit hits the target 5 times in 8 attempts, Ravi hits it 3 times in 5 attempts and Hari hits it 2 times in 4 attempts. What is the probability that the target is hit by at least 2 persons ?
correct answer:-1
