You have 3 shirts: 1 red, 1 white, 1 blue.
You have 3 hats: 1 red, 1 white, 1 blue.
What is the probability of picking a red shirt and a blue hat?
(I think it 1/9, because 1/3*1/3=1/9).
If you have a jar of 8 red marbles, 5 blue marbles, and 7 white marbles, what is the probability that you will pick a red marble, then without replacing it, a blue marble?
(My "wrong" answer: 8 out of 20 marbles are red, so that is 8/20, then you take a red so you have 19 left, so since there are 5 blue marbles, that's 5/19. Then I think you multiply 8*5=45, then 20*19=380, so that's 45/380, which can be reduced to 9/76 (can i reduce it any more?) so I think the answer is 9/76).
PLEASE EXPLAIN YOUR ANSWERS!
2006-10-22 10:21:01 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
That looks correct, except 8*5 is 40 not 45, so the answer to 2. is 2/19.
2006-10-22 10:28:21 · answer #1 · answered by jacinablackbox 4 · 0⤊ 0⤋
8 x 5 =45?
Reduce the 8/20 first. It'll be easier.
2006-10-22 17:33:41 · answer #2 · answered by Nomadd 7 · 0⤊ 0⤋
top answer is correct.
but 8 times 5 is 40... so it would be 40/380, which is reduced to 2/19.
2006-10-22 17:28:43 · answer #3 · answered by caseyhott82 2 · 0⤊ 1⤋
your right
2006-10-22 17:46:57 · answer #4 · answered by Kirlia 2 · 0⤊ 0⤋