Practice Probability – 3 balls inside a bag having numbers on it written 1, 2, 3 on it. A ball is taken and then put inside it. Find probability that all 3 nos. are the same when it is taken 3 times?
Practice Probability – On a windy day, out of every 3 sand dunes formed, only 1 remains. Out of 5 blown-out sand-dunes, 1 has treasure and only 2 out of 5 sand dunes formed have lucky coupons. Find the probability that the blown-out sand dune will contain both the things.
Practice Probability – Find the probability if a two digit number multiplied by 3 but not 5
Practice Probability – One lady has 2 children, one of her child is boy, what is the probability of having both are boys
Practice Probability – In a kilometer race, If Abhishek gives Bharti a 40 m start, Abhishek wins by 19 sec. But if Abhishek gives Bharti a 30 sec start, Bharti wins by 40 m. Find the time taken by Bharti to run 5,000 m?
Practice Probability – When four dice are thrown, what is the probability that the same number appears on each of them ?
Practice Probability – What is the probability that a two digit number selected at random is a multiple of 3 and not a multiple of 5 ?
Practice Probability – What is the probability of getting at least one six in a single throw of three unbiased dice ?
Practice Probability – Two squares are chosen at random on a chessboard. What is the probability that they have a side in common?
Practice Probability – There are ten pair of socks in a cupboard from which 4 individual socks are picked at random. The probability that there is at least one pair is
Practice Probability – Ram and Shyam have a cube each. Ram paints four faces of cube with red color and rest with blue color. Ram asks Shyam to paint his cube as well with some sides red and some side blue. They now start rolling the cubes simultaneously. After doing this for very long Ram observes that probability of both cubes coming up with same color is 1/3. How many faces of his cube did Shyam paint red ?
Practice Probability – Out of 40 consecutive integers, two are chosen at random. Find the probability that their sum is odd?
Practice Probability – Kunal electronic services assemble computers. Over a period of time the engineers made the following observation regarding the two vital components – the USB port and CD drive. The probability that USB port is defective is 0.1, that both the USB port and CD drive are defective is 0.02, while the probability that only the CD drive is defective is 0.03 . The probability that the USB port is defective when the CD drive has been found to be defective is?
Practice Probability – A fair coin is tossed repeatedly. If head appears on first 5 tosses what is the probability that tail appears on 6th toss ?
Practice Probability – 8 coins are tossed. Whats is the probability that one and only one turns up head ?