There is a five-volume dictionary among 50 books arranged on a shelf in a random order. If the volumes are not necessarily kept side-by side, the probability that they occur in increasing order from left to right is

There is a three volume dictionary among 40 books arranged on a shelf in a random order. Then the reciprocal of probability of these volumes standing in increasing order from left to right (the volume are not necessarily kept side by side) is

There is a five volume dicitionary among 10 books arranged in a shelf in random order. The probability that these volumes stands in increasing order from left to right not necessarily kept side by side is

A three digit number is chosen, what is the probability of having digits in increasing order from left to right .

A three digit number is chosen, what is the probability of having digits in increasing order from left to right .

IF one side is chosen at random from the sides of a right triangle, then the probability that it is hypotenuse is ……………

A={1, 2, 3, ..., 9} . If three numbers are selected from set A and are arranged, the probability that three numbers are either in increasing order or in decreasing order.

A={1, 2, 3, ..., 9} . If three numbers are selected from set A and are arranged, the probability that three numbers are either in increasing order or in decreasing order.