Math Is Fun Forum

mom

Member

Registered: 2012-04-25

Posts: 94

Calclulating Sales

I don't know why but I am stuck on this problem. Can someone please help?
An appliance store sells a 15" TV for $250 and a 19" TV for $500. During a one-week period the store sold more 19" TVs than 15" TVs and collected $20,000. What was the total number of TV sets sold?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,619

Re: Calclulating Sales

hi mom

I'll say 'f' is the number of fifteen inch sold and 'n' the number of nineteens.

You also know n > f.
That still leaves a lot of possible answers. 

eg.  n = 40 and f = 0    OR n = 39 and f = 2 etc etc.

Is there more information?

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Calclulating Sales

There is a total of 13 solutions at the moment.

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Calclulating Sales

Hi;

How about 14 for the answer?

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Calclulating Sales

Yes, sorry. There 14 of them.

Last edited by anonimnystefy (2013-05-08 05:38:05)

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

mom

Member

Registered: 2012-04-25

Posts: 94

Re: Calclulating Sales

Thanks everyone. I did find the answer though it was painful as I could not figure out the formula.

28 15" TV's at $250 = $14000
24 19"TV's at $500 =  $ 6000
52 total TV's           = $20000

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Calclulating Sales

Hi mom (this sounds kinda weird)

Is there a part of the question you haven't posted?

---

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Calclulating Sales

Hi;

But why do you like that answer better than this one?

6 15 inchers

37 19 inchers

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

mom

Member

Registered: 2012-04-25

Posts: 94

Re: Calclulating Sales

awww I see the issue of the confusion. I did not type in the whole problem. 4 more were sold. Not just more were sold.

Sorry everyone.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Calclulating Sales

Ah, yes. With that detail the answer is unique and it is the same as your answer.

---

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Calclulating Sales

Hi;

Yeparoo! Exact a mundo!

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.