55 798
Assignments Done
97,2%
Successfully Done
In December 2017
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Statistics and Probability Question for Tony

Question #419
Observations have shown that in some areas in September there are 12 rainy days in average. What is the probability that out of eight randomly taken days in this month three days will be rainy?
Expert's answer
There are 30 days in September. Thus, 8 days can be selected in N = (C30)^8 different ways. There are 12 rainy days, thus, there are 18 not rainy days. We are interested in situation when there are 3 rainy and 5 not rainy days among 8 randomly taken days.

3 rainy days can be selected out of 12 rainy days in (C12)^3 ways. 5 clear days can be selected out of 18 clear days in (C18)^5 ways. The total number of ways to select 3 rainy and 5 clear days is: m = (C12)^3 *(C18)^5.

Thus, the probability of having exactly 3 rainy days in the selection is: P = m/N = ((C12)^3 *(C18)^5)/(C30)^8 ≈ 0.322.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be first!

Leave a comment

Ask Your question