There are 3 black and 7 white balls in the box, identical in touch. You draw 3 balls randomly. If you find 1 black ball among the drawn ones, you will win $1, if you find 2 black balls, you win $2 and you will win $10, if all 3 are black. What are the chances to win at least 1 buck?

Question

anonymous · Answer

3/10 for the first draw.
3/9 for the second.
3/8 for the third.
3/10 + 3/9 + 3/8 = ?

This is what you want to find out.

kropot72 · Answer

@Davinderpal This can be solved using the hypergeometric distribution. Do you want an explanation/

anonymous · Answer

a supermarket raised the price of a loaf of bread by exactly 30% which of the following could  not be the resulting price of the item