Question

the probability that it will rain tomorrow is 0.85 what is probability that it will not rain tomorrow ?
a. 0.25
b. 0.145
c. 3/20
d. none of these​

Answer 1

0.15 is probability that it will not rain tomorrow. Option C is correct.

Step-by-step explanation:

• Given data

        Probability of rain tomorrow = 0.85

        Let probability of no rain tomorrow =X

• We know that

        Probability of rain tomorrow +Probability of no rain tomorrow = 1

• On putting respective value in above equation

        0.85 +X =1

• Subtracting 0.85 on both side, we get

        0.85 + X - 0.85 = 1 - 0.85

        X = 0.15

• $\mathbf{X=0.15=\frac{15}{100}=\frac{3}{20}}$    Means option C is correct.

Answer 2

Probability of not happening= 1- probability of happening

So you get 0.15

Have a nice day :)