Recent content by duki

51 and 52

Ok, I got 0.3905?

20% that they don't and 80% that they do?

updated

Thanks for the reply! Actually I have no idea what a distribution is... I'm completely new to this stuff. The only thing I'm semi-familiar with is building the trees (like in the case of flipping coins multiple times)

Homework Statement A box has 10 bass, 6 are black and 4 are white. Three balls are removed from the box, color unknown. Find the probability that a fourth ball removed will be white. Homework Equations The Attempt at a Solution I got: \frac{4}{10} * \frac{3}{9} * \frac{2}{8} * \frac{1}{7}...

Homework Statement experience shows that 20% of the people reserving tables at a certain restaurant never show up. If the restaurant has 50 tables and takes 52 reservations, what is the probability that it will be able to accommodate everyone? Homework Equations The Attempt at a...

hurah! mucho gracias! Let's go to my new counting post! :p

ooooooooooooooooooooooooooooooooooooooooo, so I have: 9000 -3584 = 5416 that do not have a 2 or 3 ?

So why would 9990 for example not be valid? It is positive and uses 0 in the one's position. I assumed I could not use 0 but I could use 10, 100, 1000, etc.

I'm not sure... why is it not 9998?

Homework Statement A committee of seven is to be chosen from 8 men and 9 women. a) how many possible committees are there? b) how many committees contain at least 6 woment? c) if bob and alice cannot be on the same committee because they cannot work together well, how many committees are...

9998 - 3584 = 6414?

ahhh... 8^{n-1} * 7 ?

Hm, so ... 7 8^(n-1) + 7?