PROBABILITY 1

The probability that it will rain tomorrow is ⁸/17. 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)=  ⁸/17         P(E’) = ?

P(E)   + P(E’) = 1

⁸/17   + P(E’) = 1

P(E’) = 1 -  ⁸/17  

P(E’) = ¹⁷/17 -  ⁸/17  

P(E’) = ¹⁷/17 -  ⁸/17  

P(E’) =  17-8

               17

P(E’) =  9

             17

Hence the probability that it won’t rain is ⁹/17.

TRY THIS......

The probability that it will rain tomorrow is ²/11. Find the probability that it won’t rain.