desperatestudent

Hello, I am studying for an exam on Monday. I am stuck on these 4 practice questions. 1) 60 students were asked about movies they had seen during the past month. 20 of the students had seen a comedy, 15 had seen a horror movie and 5 had seen both a comedy...

Me again. I just have one more question. I want to make sure I understand this question. 60 students were asked about movies they had seen during the past month. 20 of the students had seen a comedy, 15 had seen a horror movie, and 5 had seen both a comed...

A student taking an examination is required to answer exactly 10 out of 15 questions. I think i'm supposed to use combination right? Order does not matter? Because it can be any choice of the 10 questions? I am usually horrible deciphering what to do but...

In a survey of 300 individual investors regarding subscription to the NYT, WSJ, and UST....: 122 sub to NYT 150 sub to WSJ 62 sub to UST 38 sub to NYT and WSJ 20 sub to NYT and UST 28 sub to WSJ and UST b) How many individual investors surveys subscribe t...

Let A and B be two events in a sample space S such that P(A) = .6 and p(B l A) =.5. Find P (A∩B). Well, I know that that should start off by finding P(A l B) which is found using the formula P(A∩B)/ P(B) but I am not given P(B) here so I don't know what t...

Venn diagrams stump me a bit but I know that they are more useful and quicker than the addition rule.

For question 2, I am only supposed to set up the venn diagram.

imgur.com/a/u 8bdn9g For reference to question 2 because this website doesn't allow urls.

without the space between u and 8

I just want to know if I should use the combination formula.

Or wait.. I might be getting the formulas mixed up. I think I must multiply P(A) by P(B l A) right?

For P(A∩B)?

0.3 that is my final answer.