Problem 1. Let X=\ 0,1,2,3,4\ and mathcal A \ 0,X,\ 0\ ,\ 1,2,3,e\ \ a) Prove A is an algebra of subsets of X.
b) Is A a o-algebra of subsets of X?
c) Find an algebra D of subsets of X such that \ 0\ in mathcal D , mathcal D ne mathcal A and

The tile along the edge of a triangular community pool needs to be replaced? ?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.