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Start learning 50% faster. Sign in nowSpeed of the boat in still water = 36 X (60/24) = 90 km/h Speed of the stream = 90 X (2/5) = 36 km/h Upstream speed of the boat = 90 - 36 = 54 km/h Required time = (243/54) X 60 = 270 minutes
A bag contains 7 blue balls, 28 red balls, and 10 green balls. One ball is drawn at random. Find the probability that the ball drawn is either blue or g...
A box contains 5 red, 6 green and 3 yellow balls. 2 balls are drawn at random. What is the probability that they are not of the same colour?
A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one b...
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...
If a coin is tossed repeatedly and the head appears for the first 94 times then what is the probability that the tail appears on the 95th toss?
A bag contains 5 red flowers, 7 yellow flowers and 8 green flowers. 3 flowers are drawn randomly. What is the probability that the flowers drawn contain...
A box contains 5 blue jellies, some red jelly and rest yellow jelly. The probability of picking a red ball at random is 3/10, while the probability of p...
18 rotten bananas are accidentally mixed with 132 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banan...
Tokens numbered 1 to 350 are in a bag. What is the probability that the Token drawn has a number which is a multiple of 6 or 7?
