##### 5.13
lydiark25
Could you please re explain/clarify the answer to this problem? I don't get the back of the books explanation.
weisbart: Jan. 20, 2015, 5:21 p.m.
Think of it this way, the flea must jump exactly 12 jumps to the right and 8 jumps to the left if he is to land on 4. Why is this? How many ways can he do this?  For the second part, he has an even number of jumps, so is it possible for him to jump to an odd place?