Suppose a man starts at 0, and has to go to 20 on the number line. He can either move in steps of 1 or 2. How many number of ways can he do this?Extending this, if we know the number of ways for going from 0 to n, how do we get the number of ways for goin

Suppose a man starts at 0, and has to go to 20 on the number line. He

1.	Suppose a man starts at 0, and has to go to 20 on the number line. He can either move in steps of 1 or 2. How many number of ways can he do this?Extending this, if we know the number of ways for going from 0 to n, how do we get the number of ways for goin
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