Question

A coin is tossed 3 times.find the probability of getting tails atleast once

Answer 1

Hi friend,

A coin is tossed 3 times,

Possible outcomes are:-

{HHH}{TTT}{HTT}{THT}{HHT}{HTH}{THH}{TTH}

Number of possible outcomes are 8.

The probability of getting tails at least once :-

[Atleast once means one or more than one]

Favourable outcomes are
{TTT}{HTT}{THT}{HHT}{HTH}{THH}{TTH}

Number of favourable outcomes = 7

Probability = ⅞

Hope it helps...