PROBABILITY C1

The probability that it will rain tomorrow

is ⁵/11. Find the probability that it won’t rain.

Solution

Let P(E) =  ⁵/11         P(E’) = ?

P(E)   + P(E’) = 1

⁵/11  + P(E’) = 1

P(E’) = 1 -  ⁵/11  

P(E’) = ¹¹/11 -  ⁵/11  

P(E’) =  11-5

               11

P(E’) =  6

            11

Hence the probability that it won’t rain is ⁶/11.


TRY THIS..........

The probability that it will rain tomorrow

is ³/20. Find the probability that it won’t rain.