Monday

April 21, 2014

April 21, 2014

Posted by **John** on Saturday, March 6, 2010 at 5:15am.

the answer at the back of the book is 23, but i don't know how to solve it.

- Data Management -
**MathMate**, Saturday, March 6, 2010 at 9:25amWe note that the question requires different sums of money, irrespective of how they are made up, it is important not to double count. For example 1-$10 and 2-$5 bills should be counted as one sum.

Start with the multiples, namely the $5, $10, and $20 bills. The possible sums range from $0 to $55 in $5 increments. That makes 12 possible sums.

By adding a $2 bill, we get 12 more sums, namely from $7 to $57 in $5 increments. This makes a total of 24 sums, including $0.

If the question implies at least one bill must be used, then there are 23 sums.

- Data Management -
**John**, Sunday, March 7, 2010 at 8:37pmis there a formula for this?

**Related Questions**

Data Management - How many different sums of money can be formed from one $2 ...

Math - If you have one $50 bill, one $20 bill, one $10 bill and one $100 bill, ...

probability - Assume that there is an urn containing seven $50 bills, six $20 ...

Math - Lyle wanted change for a $100 bill. He wanted at least three $20 bills, ...

Math - A box contains a one-dollar bill, a five-dollar bill, a ten-dollar bill, ...

math - Joseph sold tickets to the school musical. He had 12 bills worth $175 for...

statistics - I have 6 bills that total $63 and there are no $1 or coins? what ...

Math - A box contains a one-dollar bill, a five-dollar bill, a ten-dollar bill, ...

Math - an envelope contains 20 bills in denominations of $1,$5,$10, there are ...

Math - Place twelve $1 bill and $10 bill on the template. Than exchange bills so...