55 792
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 Rahman

Question #8891
An urn contains 7 white balls and 10 red balls. Five balls are selected. In how many ways can the 5 balls be drawn from the total of 17 balls:
iii) If all 5 balls are red?
iv) If all 5 balls are white?
v) If at least 4 are red balls?
vi) If at least 2 are of same color?
Expert's answer
An urn contains 7 white balls and 10 red balls. Five balls are selected. In how many ways can the 5 balls be drawn from the total of 17 balls:
iii) If all 5 balls are red?

There are C(10,5) = 252 ways to drawn 5 red balls from 10 red balls.

iv) If all 5 balls are white?

There are C(7,5) = 21 ways to drawn 5 white balls from 7 white balls.

v) If at least 4 are red balls?

There are C(10,4) = 210 ways to drawn 4 red balls from 10 red balls and C(17-4,1) = 13 ways to drawn one other (red or white) ball. So, totally 210+13 = 223 ways.

vi) If at least 2 are of same color?

There are C(10,2) = 45 ways to drawn 2 red balls and C(7,2) = 21 ways to drawn 2 white balls; so, there are 45+21 = 66 ways to drawn 2 balls of same color. At last, there are C(17-2,3) = 455 ways to drawn three other balls, so the total is 66+455 = 521.

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