Question

a coin is tossed 5 times find the probabilty that none are tails

Answer 1

The probability of getting non tails is 1/4

Answer 2

If a coin is tossed, it may be heads or tails i.e two outcomes
Here coin is tossed 5 times. Therefore total no.of outcomes = 5*2 = 10
No. of possible outcomes = heads for 5 times(non are tails) = 5

Probability = No. of possible outcomes/total outcomes
                  = 5/10
                  = 1/2