Recent content by bethanyd

aw, no problems... this question is so frustrating because it's really difficult to find examples online, and I don't think we did a single example in class of this. I don't want to just guess the answer, but I may have to!

hmm, possibly... we're not supposed to use calc in my course, or would there be another way of solving it?

Homework Statement If X is a discrete random variable with p.d.f. f(x) = {cx if x=1,2,3,4 ; 0 otherwise} where c is a constant. Find P(1< X =< 3.5) Homework Equations I solved for c: f(x) = 1 = c(1+2+3+4) 10c = 1 c = 1/10 The Attempt at a Solution I have the following solution...

Hey Sorry, I meant, "A occurs but B does not"... Would that simply be P(A)?

Homework Statement Suppose that A and B are two events of a sample space S such that P(A) = 0.7, P(B) = 0.6 and P(AinterceptB) = 0.4. What are the probabilities of the following: 1. A occurs and B does now 2. Exactly one of the two events occurs 3. Neither event occurs. I have tried...

Actually, I have another possibility I thought of. Since P("husband and wife not being on the committee") = 1 - P("husband and wife on same committee"). There are 5 couples, ie, 5 sets of husband and wife, and (10, 4) total possibilities. Could P("husband and wife on same committee") = 5...

Hey Would it be possible to give a bit more guidance? I don't quite understand this. I have 5 groups of two couples each. 1 person from the 2 in the group can be selected... so would it be something like: (2, 1)(2, 1)(2, 1)(2, 1)(2, 1) / (10, 4) Please help! Thanks Beth

Hey Okay, so here is the solution to this problem I have come up with: P("all men") = (5, 4) P("3 men, 1 woman") = (5, 3)(2, 1) P("2 men, 2 women") = (5, 2)(3, 2) P("1 man, 3 women") = (5, 1)(4, 3) P("all women") = (5, 4) And total possibilities: (10, 4) Then, as I said above...

My friend came up with some solutions but I have doubts about them and was wondering if someone could help a bit. Homework Statement A committee of 4 people is randomly selected from 5 married couples. What is the probability that a husband and wife do not belong to that committee? The...

just to elaborate a little... This question is asking you to draw out level curves because the level curves can give a fairly clear picture of what the surface is while dealing with less variables. you set f(x,y) = k where k is a number (usually, but not always, an integer) you get rid of one...

Homework Statement I am working on a correspondence grade 12 Chemistry Course and I am confused by one question. I did an experiment involving hydrochloric acid (HCl) and sodium hydroxide (NaOH). Here is the question: "In a reaction, Na+ ions are separated from OH- ions, a process of...