Recent content by maiad

Let A(i) be the event that the first ith person have different birthdays for i=1,2,3...,n. We note that A(i+1) is a subset of Ai such that Ai(A(i+1))= A(i+1) I wonder why A(i+1) is a subset of Ai. If the first 3 people have no birthdays in common, shouldn't that also mean the first 2 people...

Homework Statement The demand for good A is unit elastic. This means that a 5 percent increase in price will ______ A) result in an infinite increase in the quantity of A demanded. B) result in a 1 percent decrease in the quantity of A demanded. C) result in 5 percent increase in quantity...

Homework Statement You are a real estate salesperson and you currently have 10 listings. Past experience has shown that you will sell approximately 70% of your listings. If sales are independent: What is the probability that you make exactly 8 sales? Homework Equations The Attempt...

Let A be the males that like the commercial and B, the male that are neutral towards the commercial

is it because the two varibles can't overlap because their exclusive so we don't have to account for the everlap so we don't need to use the inclusion-exclusion rule?

Would it just be (400+500)/2000 =0.45?

Finding probabilities through general addition rule Homework Statement http://postimg.org/image/q9ztktpot/ Homework Equations P(A or B)=P(A)+P(B)-P(A and B) P(A and B)=P(A)P(B)The Attempt at a Solution The question is for part b). It said it was only focused on the mens so i ignored all the...

nvm i found the answer lol

Homework Statement A stockbroker purchases 5 different stocks. During the next month, each stock can either raise,fall or stay the same. How many different possibilities are there? Homework Equations The Attempt at a Solution For each stock, there are 3 possible...

OH okay i get it. Ty for the explanation guys ^^

Homework Statement An accounting professional association is considering six hotels as possible sites for their next two meetings in 2001 and 2002. In how many ways can the association select the hotels... a) if the two meetings may be held at the same hotel? b)if the two meetings may not be...

O there we go thanks.

Homework Statement An investor wants to purchase one investment among common stocks, preferred stocks and bonds of six industries located in several countries. The investor can use a full-service broker or a discount broker and can buy with cash or margin. If there are 288 possible choices...

You're correct. The left tail is wrong as you stated. But even with more precision in my numbers, it's still a fair bit off from the actual answer which is 81.40%

Homework Statement People drink on average, 78L of beer per year with a standard deviation of 25L. at least what percentage of people would drink between 20 and 136L per year? The Attempt at a Solution I found the z-scores of both and they came up to be +/- 2.32. Compared these values to the...