Question

A game consists of tossing a one-rupee coin three times, and noting its outcome each time. Find the probability of getting three heads.

Answer 1

When a coin is tossed three times, all possible outcomes are
HHH, HHT, HTH, THH, HTT, THT, TTH and TTT.

Number of total outcomes = 8.

Outcome with three heads is HHH.

Number of outcomes with three heads = 1.

∴ P(getting three heads) =`("Number of favourable outcomes")/"Number of all possible outcomes"`

`= 1/8`

Thus, the probability of getting three heads is `1/8`.