SEARCH HOME
Math CentralQuandaries & Queries

search

Question from Pedro, a student:

I was given this word question an was somewhat confused can u help me understand.
An ice cream vendor sells 15 flavors of ice cream and u want to sample at least
4 different types. how many different combinations of ice cream would u be able
to sample?

Hi Pedro,

I think the problem is this. You go to the vendor and order 4 different types. How many different choices do you have? That is how many ways can you choose 4 flavors from 15 flavors?

Penny

 

What you did corresponds to the problem

"...She spent most of the money on jewellery, keeping a quarter. Then she bought a digital camera, keeping 2/3 of the remaining money."

See the difference?

A way to make this more intuitive: think of really extreme proportions. Suppose she had spent 99% of her money on a camera and had $2 left: what would you do to find what she started with? Now do exactly the same thing with the numbers you were given.

Good Hunting!
RD

About Math Central
 

 


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS