1.

Starting at (0,0), an object moves in x-y plane via a sequence of steps, each of length 1 unit. Each step is left, right, up or down, all the four being equally likely. The probability that object reaches (2,2) in exactly 4 steps is

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Starting at (0,0), an object moves in x-y plane via a sequence of steps, each of length 1 unit. Each step is left, right, up or down, all the four being equally likely. The probability that object reaches (2,2) in exactly 4 steps is




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