Math Help :o

[mufalmar]

So, generally i'm good in Math class. I had a 97 last quarter. But now that we're in the 4th quarter, i have a practice test that we have to hand in, and i want a high grade on it since it's the first grade of the quarter. Just some problems I want some help on, since I always really want to know how to do them.

Question 1 : Probability

A man has a jar of lollipops. In the jar he has purple and red lollipops. There are 3 more red lollipops than purple lollipops. A man comes over for a lollipop. If the probability of picking, at random, a purple lollipop out of the jar is 4/9, how many red lollipops and how many purple lollipops are in the jar?

Question 2 : Probability

License plates are being made. Three numbers out of {1,2,3,4,5,6,7,8,9} have to be chosen, and 3 letters have to be chosen. If numbers and letters can be repeated, how many license plates can be made?

Question 3 : Probability

The way to make license plates in a company is about to be changed. They currently have to options on how to make them :

Option 1 - Choose 3 letters and a 4 digit number for the license plate. If no letters or numbers can be repeated, how many license plates can be made using this option?

Option 2 - Choose 4 letters and a 3 digit number for the license plate. If letters and numbers can be repeated, how many license plates can be made using this option?

B ) Which option will make more license plates? By how much?

Question 4 :

Expressed as a single fraction, what is 2/x+2 (minus) 1/x?

(1) 1 / x (3) 1 / x(squared)+2x

(2) 1 / 2 (4) x - 2 / x(squared)+2x

(Show work, like how to do it please)


BTW : / = fraction bar.

Thanks for the help. MUCH appreciated.

[Mikeee]

Would help but I'm on PS3 net. Sorrryyyy.

[smilie]

judging by your grade, you don't really need any help at all. :)

1: Purple - 12 Red - 15 by let x = purple and x+3 = red then equation will be x/(x+x+3) = 4/9 then solve for X

2: 12812904 by (9)(9)(9)(26)(26)(26) and simplify

3: Don't get the question clearly if no digits can be repeated or numbers.

4: (x-2)/x(squared)+2x by addition/subtraction of fractions

and what do you mean by this:

(1) 1 / x (3) 1 / x(squared)+2x

(2) 1 / 2 (4) x - 2 / x(squared)+2x

[mufalmar]

judging by your grade, you don't really need any help at all. :)

1: Purple - 12 Red - 15 by let x = purple and x+3 = red then equation will be x/(x+x+3) = 4/9 then solve for X

2: 12812904 by (9)(9)(9)(26)(26)(26) and simplify

3: Don't get the question clearly if no digits can be repeated or numbers.

4: (x-2)/x(squared)+2x by addition/subtraction of fractions

and what do you mean by this:

(1) 1 / x (3) 1 / x(squared)+2x

(2) 1 / 2 (4) x - 2 / x(squared)+2x

3 : I think it would be for if you can't repeat a number 1-9 it'd be (9)(8)(7) or so.

4 : Those are the answer choices

[smilie]

3 : I think it would be for if you can't repeat a number 1-9 it'd be (9)(8)(7) or so.

4 : Those are the answer choices

Then you mean digits. :)

for the fourth question the answer is the fourth choice. :)

[mufalmar]

Then you mean digits. :)

for the fourth question the answer is the fourth choice. :)

Yes, i guess i do mean digits =o

Thanks for the help ^_^

[smilie]

3rd question: Option 1: 78624000 by (26)(25)(24)(10)(9)(8)(7)

Option 2: 456976000 by (26^4)(10^3)

B: Option 2 by 378352000 :)

All of these are not 100% sure :)

[mufalmar]

3rd question: Option 1: 78624000 by (26)(25)(24)(10)(9)(8)(7)

Option 2: 456976000 by (26^4)(10^3)

B: Option 2 by 378352000 :)

All of these are not 100% sure :)

Yeah, that's what I did on the test, but i told the teacher i didn't finish it cuz i wasn't positive. I only thought it was wrong because the numbers seemed ridiculously large.

Thanks for the help, though

[smilie]

Yeah, that's what I did on the test, but i told the teacher i didn't finish it cuz i wasn't positive. I only thought it was wrong because the numbers seemed ridiculously large.

Thanks for the help, though

In a probability problem, the situation of digits or letters being repeated or not is an important factor. :)

I encountered them a lot during my 3rd year in high school. :)

[SoulOfTheSky]

Lol, Im to young to start learning this.

I'm only a Year Nine xD (14)