if you add a negitive to a positive its like subtracting like 20 - (-30) (that would be -10) for your question its 0.6
The probability of an event is the number of favorable outcomes divided by the total number of outcomes possible. Converting the fraction 35 to a decimal, we would say there is a 0.6 probability of choosing a banana. This basic definition of probability assumes that all the outcomes are equally likely to occur.
<em>hope </em><em>it </em><em>helps</em><em>.</em><em>.</em><em>.</em><em>!</em><em>!</em><em>! </em>
Mr young has 30 times as many pencils as jack.
the whole school has 200 times as many pencils as jack
if jack has 2 pencils
how many pencils does mr young have? 60
How many pencils does the whole school have? 400
The formula for perimeter is P = 2L + 2W. We are told that the perimeter is 8 times the width, so P = 8w. We are also told that the length is 90. So our revised formula is 8w = 2(90)+2w, which simplifies to 8w = 180 + 2w, and 6w = 180. That means that w = 30. And there you go!
There are 10 chips altogether. 4 of them are white.
4/10 is the chance of lifting out a white chip
There are 3 of them left and 9 chips altogehter.
4/10 * 3/9
12/90
4/30
2/15
Comment
(my edit) it is not that 2/15 is wrong (although it is not entirely right).
1/3 is the correct answer if you assume that what happened during the first draw has nothing to do with what will happen on the second. It is like saying if you throw 11 heads in a row with a fair coin, what are the chances of throwing a heads on the 12th throw? The answer is 1/2. That is the same kind of question you have asked.
The two of us who have responded have really responded to what are the chances of drawing 2 white chips. The question really does not restrict us in a way that prevents us from saying that. I'll stick with
B <<<< answer
but I think it would be nice if the writer of the question made it clear that 1/3 should be the proper answer. I am glad you came back and posted the right answer. It makes me think.
The semi right answer is B <<<<----
If my reasoning bothers anybody, I'll reedit again. I'm only leaving it because sometimes a mistake is more instructive than a given answer.