PROBABILITY 2

The probability that it will rain tomorrow is ⁸/47. Find the probability that it won’t rain.

Solution

Let P(E)= probability that it will rain.

     P(E’) = probability that it won’t rain.

Let P(E)=  ⁸/47         P(E’) = ?

P(E)   + P(E’) = 1

⁸/47   + P(E’) = 1

P(E’) = 1 -  ⁸/47  

P(E’) = ⁴⁷/47 -  ⁸/47  

P(E’) =  47-8

               47

P(E’) =  39

             47

Hence the probability that it won’t rain is ³⁹/47.

TRY THIS......

The probability that it will rain tomorrow is ²³/70. Find the probability that it won’t rain.