Book Maths Puzzle Numerical Ability Probability

Suppose a random sample of size n is drawn from a population of r objects without replacement. Find the probability that k given objects are included in the sample.

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Book Other Question

A cyclist left point A for point B and travelled at a constant speed of 25km/h. When he coverred the istance of 8.33km he was overtaken by a car that left point A 12 minute after the cyclist and travelled at constant speed too. When the cyclist travelled another 30 km, he encountered the car returning from B. Assume that the car did not stop at point B. ind the distance between A and B. add five 0 to get the result 5???