|By Haithman (Haithman) on Thursday, April 08, 2004 - 05:52 pm: Edit|
Ok I've got some Math questions that I am sure some of you can help me on. I always Omit one question and get one wrong or miss two and I cant get out of the 740-770 Range.
Sunday, May 1996
17.) If y = 1+1/x and x>1, then y could equal
E.) 19/7 The Answer is C
25.) A barrel contains only apples and oranges. There are twice as many apples as oranges. The apples are either red or yellow, and 4 times as many apples are red as are yellow. IF one piece of fruit is to be drawn at random from the barrel, what is the probability that the piece drawn will be a yellow apple?
The answer is 2/15 or .133
|By Aruben537 (Aruben537) on Thursday, April 08, 2004 - 06:06 pm: Edit|
For #25, There is a 2:1 ratio between apples and oranges. One fifth of the apples are yellow.
To allow that to fit the first ratio, multiply it by 5 to get a 10:5 apples:oranges ratio. Out of the total 15 fruits, since one fifth of the 10 apples are yellow, there are 2 yellow, which makes for 2/15 of the total fruit.
|By Daromanian (Daromanian) on Thursday, April 08, 2004 - 06:06 pm: Edit|
17. set each of the answers equal to 1+1/x, you see that x turns out to be > 1 only when 1 + 1/x = 9/7, x turns out to be 7/2.
25. chance = 2/3 (chance of being an apple) * 1/5 (chance of the apple being yellow) = 2/15
|By Haithman (Haithman) on Thursday, April 08, 2004 - 06:20 pm: Edit|
Wow I feel really stupid especially on the #17 one. Thanks alot! Im still a little confused about the apples one...how are 1/5 of them yellow? Thank You
|By Haithman (Haithman) on Thursday, April 08, 2004 - 06:52 pm: Edit|
|By Tanman (Tanman) on Thursday, April 08, 2004 - 06:58 pm: Edit|
For every two apples there is one orange so out of the total 3 fruit, 2/3 are apples
There are twice as many apples as oranges
For every 4 red apples there is 1 yellow apple, so out of five total apples, there is one yellow one.
4 times as many apples are red as are yellow
|By Haithman (Haithman) on Thursday, April 08, 2004 - 07:24 pm: Edit|
Ah I see! Thanks alot!
|By Eeeeyor (Eeeeyor) on Thursday, April 08, 2004 - 09:44 pm: Edit|
i think that its a waste of time to set al the answers equal to 1+1/x. just look at it. you know the answer is greater than one, that eliminates a and b, then you see that if x is greater than 1 than the answer has to be less than two, that eliminates d and e.
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