Question

Choose the correct alternative:

Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times. Then the possible values of X are

Options

• i + 2n, i = 0, 1, 2 …, n

• 2i – n, i = 0, 1, 2 …, n

• n – i, i = 0, 1, 2 …, n

• 2i + 2n, i = 0, 1, 2 …, n

Answer 1

2i – n, i = 0, 1, 2 …, n