Posted by **mel** on Tuesday, September 27, 2011 at 6:54pm.

Six hundred pennies are placed in a row. If every other penny is replaced by a nickel and every third coin is replaced by a quarter, what is the final value of the 600 coins?

- math -
**MathMate**, Tuesday, September 27, 2011 at 7:36pm
600 pennies = $6.00

after replacement by a nickel, there are 300 pennies and 300 nickels.

Value = 300*0.01 + 300*0.05 = $18.00

Finally, the replacement by quarters every third coin means that one-third of the nickels and one-third of the pennies will be replaced by quarters.

Think of the replacement process: the first one encountered is a penny, the next one is a nickel, the third one is a penny, .....

In the end, there will be

200 pennies,

200 nickels, and

200 quarters.

Total value = 200(0.01+0.05+0.25)=$62.00

## Answer this Question

## Related Questions

math - HELP HELP I need to work this questions. Six hundred pennies are placed ...

math - Eight pennies are placed in a row on a tabletop. Every other coin is then...

MATH - 24 1c coins are set out in a row on a table. Then every 2nd coin is ...

MATHS - 24 1c coins are set out in a row on a table Then every 2nd coin is ...

Math - A coin purse contains 10 pennies, 5 nickels, 3 dimes, and 2 quarters. Two...

Math - Suppose there are 500 pennies in a row... (math problem)? The pennies are...

Algebra 2 - You have 10 coins..3 quarters,5 dimes, and 2 nickels. a. A coin is ...

maths - Class 5G is having a pizza party. Mrs Baker asked all the children to ...

math - A box contains 4 coins: a penny, a nickel, a dime, and a quarter. It ...

math(Algebra two) - describe what happens to the graph of y=X^2 in the following...