During July in Jacksonville, Florida, it is not uncommon to have afternoon thunderstorms. On average, 8.4 days have afternoon thunderstorms. What is the probability that a randomly selected day in July will not have a thunderstorm? Round to two decimal places, if necessary.

I divided on this one 8.4/31 ...thought the answer was 0.27. How would I need to set up this problem to come up with the correct answer.

Question

During July in Jacksonville, Florida, it is not uncommon to have afternoon thunderstorms. On average, 8.4 days have afternoon thunderstorms. What is the probability that a randomly selected day in July will not have a thunderstorm? Round to two decimal places, if necessary.

I divided on this one 8.4/31 ...thought the answer was 0.27. How would I need to set up this problem to come up with the correct answer.

kropot72 · Answer

$$P(without\ thunderstorm)=1-\frac{8.4}{31}=you\ can\ calculate$$