Speed on the way from A to B = Distance / Time = 180 / 4 = 45 km/h. Reduced speed for the return journey = 45 * (1 - 0.20) = 45 * 0.80 = 36 km/h. Time taken for the return journey = Distance / Speed = 180 / 36 = 5 hours. Answer: b) 5 hours
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The chance that Nikhil can solve a certain problem is1/7, the chance that Tarun can solve it is3/5. Find the probability that the problem is solved if t...
Two Dice are thrown simultaneously. Find the probability that the number on the first dice is more than the number of 2nd Dice.
The probability of selecting a rotten apple randomly from a heap of 600 apples is 0.14. What is the number of rotten apples in the heap?
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The probability of selecting a rotten apple randomly from a heap of 250 apples is 0.20. What is the number of rotten apples in the heap?
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