hw2_solution

# hw2_solution - 120A HW 2 6(a the sample space is...

This preview shows pages 1–2. Sign up to view the full content.

120A HW 2 6 : (a), the sample space is { 1g,1f,1s,0g,0f,0s } , ie, that is there are 6 possible outcomes. (b), A =the event that patient is in serious condition= { 1s,0s } . (c), B =the event that patient is uninsured= { 0g,0f,0s } . (d), B c = { 1g,1f,1s } , so B c S A = { 1s,1g,1f,0s } . 11 : a good way to solve this problem is using Vein diagram. (a), Percentage of males smokes neither cigars nor cigarettes=1-(28%+7%-5%)=70%. explanation: (28%+7%-5%) is the percentage of males smokes either cigars or cigarettes. (b), Percentage of males smokes cigars but not cigarettes=7%-5%=2%. explanation: by subtracting 5%, we exclude people smoke both cigars and cigarettes from the group of people who smoke cigars. 28 : without replacement, total number of possible choices is ( 5+6+8 3 ) = ( 19 3 ) ; (a), number of interesting choices (3 balls are of the same color) is ( 5 3 ) + ( 6 3 ) + ( 8 3 ) by using addition rule. So the probability= ( 5 3 ) + ( 6 3 ) + ( 8 3 ) ( 19 3 ) = 0 . 08875129; (b), number of interesting choices is ( 5 1 )( 6 1 )( 8 1 ) by using multiplication rule, because it takes 3 steps to draw 3 balls from the urn. So the probability= ( 5 1 )( 6 1 )( 8 1 ) ( 19 3 ) = 0 . 247678;

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern