Question

In a year, during rainy season of 90 days, it was observed that it rained 20 days only. Find the probability that it did not rain.

Answer 1

Answer:

Probability that it did not rain : \frac{70}{90}  = 0.78

Step-by-step explanation:

total no. of days n(S) = 90

no. of days when it rained n(R) = 20

no. of days when it didn't rain n(R') = 90-20 = 70

therefore, Probability that it did not rain P(R') = \frac{n(R')}{n(S)}

                                                                    =\frac{70}{90}

                                                                    =0.78