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Speed of boat ‘A’ in still water = 150/15 = 10 km/hr Speed of boat ‘B’ in still water = 10 × (1/5) = 2 km/hr Downstream speed of boat ‘B’ = 2 + 3 = 5 km/hr Time taken by boat ‘B’ to cover 60 km in downstream = 60/5 = 12 hours
Two cards are drawn from a pack of 52 cards. The probability that 1 is Ace and 1 is Queen is?
There are (m + 6) red roses, (m + 10) white roses and ‘m’ pink roses in a bag. If the probability of picking a pink rose is 5/23, then find the valu...
When two dice are thrown, what is the probability that sum of the number appeared is 4 or 5?
A jar contains 10 oranges, 4 pink, 7 black, and 5 purple marbles. If a single marble is chosen at random from the jar, what is the probability that it i...
A bag contains (2x + y) red balls, 32 black balls, and (3x – y) yellow balls. The probability of drawing a red ball is 4/13, and the probability of dr...
A bag contains 7 (one rupee coins), 4 (two rupee coin) and 5 (ten rupee coin). Find the probability that 3 coins drawn at random are either (two rupee c...
A coin is tossed successively three times. Find the probability of getting exactly one tail or two tails?
A bag contains 16 black and 18 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...A basket contains (x + 4) red apples, (x + 6) green apples, and (x + 8) yellow apples. The probability of drawing a yellow apple from the basket is (7/2...
