A bag has an unknown number of colored objects, with equal numbers of each color. Adding 20 objects of a new color to the bag would not change the probability of drawing (without replacement) two objects of the same color.
How many objects are in the bag? (Before the extra objects are added.)
2006-06-14 10:07:59 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
It's not zero, because if there was nothing in the bag, you can't draw two items out and therefore the odds of drawing two thing (and of the same colour) is also zero.
When you put 20 balls of some colour into a bag with nothing in it, and draw two balls out, there is a probability of 1 that they will be the same colour. Since 0≠1, the answer is not zero.
There are 19 colours in the bag (before the other 20 are added). Each colour is represented by 10 balls. Thus there are 19*10=190 balls in the bag.
2006-06-14 10:19:55 · answer #1 · answered by Eulercrosser 4 · 3⤊ 2⤋
40
2006-06-14 17:13:00 · answer #2 · answered by lemur_monk 2 · 0⤊ 0⤋
2 objects in the bag.
2006-06-14 17:14:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
2 colors, 40 objects?
2006-06-14 17:12:26 · answer #4 · answered by martster38 4 · 0⤊ 0⤋
zero thats easy, becasue if you put 20 oblects of the same color, the you are going to get the same color becasue it was nothing ion the bag, so theres no possibilyty in getting other color
2006-06-14 17:14:17 · answer #5 · answered by emerald 2 · 0⤊ 0⤋
Zero
2006-06-14 17:11:40 · answer #6 · answered by Anonymous · 0⤊ 0⤋
zero
2006-06-14 17:11:59 · answer #7 · answered by Thomas P 2 · 0⤊ 0⤋
forty
2006-06-14 17:13:50 · answer #8 · answered by Anonymous · 0⤊ 0⤋