What can you say about the number of steps n that he took

Reference no: EM131239667

Imagine a number line with the integers marked. Your old pal Grover starts at 0, and once per second takes a step to the left or a step to the right. (Being Grover, he probably sings a song about left and right as he does this.)

(a) Is it possible for Grover to take three steps and end up back at 0?

(b) Suppose that Grover ends his meandering at k. What can you say about the number of steps n that he took?

(d) How many ways are there for Grover to take n steps and end up back at 0?

(e) How many ways are there for Grover to take n steps and end up at k?

Reference no: EM131239667

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