A flight of stairs has 10 steps. A person can go up the steps one at a time, two at a time, or anycombination of `1s and 2's`. Find the total number of ways in which the person can go up the stairs.

Find the number of ways in which four persons can sit on six chairs.

The total number of ways in which 12 persons can be divided into three groups of 4 persons each, is

If a man climbs either one step or two steps at a time, the total number of ways in which he can climb up a staircase of 2n steps (starting from the bottom) is

There are 6 trains running between indore and Bhopal ., if the person can return by any one of the 6 trains , then find the number of ways in which he can go from indore to bhopal and return from bhopal to indore .

You Walk 12 steps,going up either 1 or 2 steps with each stride.There is snake on the 8th step so you can't step thete.Number of ways you can go up is N. Then (N)/(9)=

A drunked person is 10 step away from a manhole. Suddenly he begins to walk towards the manhole. Suddenly he begins to walk towards the manhole. He walks two steps forward and one step beckward in one second. Find out (i) The time after which the person will fall into the manhole?

A drunked person is 10 step away from a manhole. Suddenly he begins to walk towards the manhole. Suddenly he begins to walk towards the manhole. He walks two steps forward and one step beckward in one second. Find out (i) The time after which the person will fall into the manhole?