Question

If P(E)=0.05, what is the probability of 'Not E'?

Answer 1

we know,
P(E) + P( not E) = 1
here, P(E) = 0.05
0.05 + P(not E) = 1
P(not E) = 1 -0.05 = 0.95

Answer 2

We know that The probability of any thing happening guarantedly is 1

and sum of probabilities of All events is 1

P ( E) + P ( not E) = 1

P ( not e) = 1 - P ( E)

= 1-0.05

= 0.95

The probability of ' Not E " is 0.95