DaveG39131

Everyday a group of 8 students is chosen from a class of 70 for extra credit work. How many different groups can be chosen? What if 10 students are chosen each day?

It's been awhile since I've done one of these:

30 marbles in a bag, 2 of which are black. Remove 11 without replacement, what is the probability none are black?

Today my cat scratched my leg. Ever since the bleeding stopped, it has been "weeping" clear liquid constantly. It doesn't look infected and I put antibiotic cream on it. I've never ha a cut do this before. Is this normal?

There are 14 marbles in a bag, 2 of which are black. If you take 3 marbles out, what is the probability at least 1 is black?

4*4+4*4+4-4*4

a)20, b)320, c) neither

I'm 90% sure it's "a" but the 10% worries me. Help! Thanks in advance.

A video poker machine has the following payouts (given a 1 coin bet)

pair of 9's or better 2

any two pair 3

3 of a kind 5

straight 10

flush 15

full house 18

4 of a kind 120

straight flush 240

royal flush 1200

Given this paytable, determine the expected value of the following assuming 2 more cards will be dealt:

a) 4,6,8 all different suits

b) 4,6,Queen all different suits

c) 4,6,6 all different suits

More interested in the work than the actual answer

Just to look cool or do they serve a practical purpose?

Take slips of paper numbered 0 through 36 and put them in a fishbowl. Draw one number out of the bowl 100 times, putting the slip back in each time. What is the probability that any single number will be drawn exactly 6 times in those 100 draws?