A man travels some distance at a speed of 12 km/hr and returns at a speed of 9 km/hr. If the total time taken by him is 4 hrs 40 min, the distance is
Let the distance travelled by a man be D km According to the question, Total time taken = 2 hrs 40 min = 4(40/60) = 14/3 hours Total time = T1 + T2 D/12 + D/9 = 14/3 (3D + 4D)/36 = 14/3 7D/36 = 14/3 D = 24 km
A bag contains 14 black and 16 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...what is the probability that at least one of them narrates an incident truthfully.
A bag contains 9 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...A speaks truth in 75% of cases And B is 80% of cases. What is the probability that they likely to contradict each other, narrating the same incident.
What is the probability that three S’s come consecutively in the word ‘SUCCESSION’?
A bag contains 30 white and some black balls. If the probability of drawing a black ball from the bag is 1.4 times that of drawing a white ball, find th...
Two cards are drawn together from a pack of 52 cards. The probability that one is a club and one is a diamond?
In an examination, there are three sections namely Reasoning, Math, and English. The reasoning part contains 7 questions. There are 4 questions in the m...
A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
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