If there is a 70% chance of rain tomorrow and a 50% chance of wind and rain, what is the probability that it is windy, given that it is rainy? round your answer to the nearest percent. a. 67% b. 71% c. 78% d. 33%

P(R) = 0.7


The correct choice of answer is B. 71%.

The chance of raining tomorrow  (B) is 70% while the chance of having a windy (A) and rainy weather is 50%. The chance hat it is windy, given that it is rainy is obtained from the rule of probability: p(A/B) = p (A and B) / p (B)
substituting, 
p(A/B) = 0.50/0.70 equal to 0.7143