Problema Solution
A change purse contains twice as many nickels as pennies and as many dimes as there are
pennies and nickels combined. The total amount of money in the purse is $213:61. Compute the total
number of coins in the purse. (Assume the purse contains only pennies, nickels, and dimes.)
Answer provided by our tutors
let 'x' represent the number of pennies, then '2x' represent the number of nickels and 'x+2x' represents the number of dimes
213.61 = 0.01x + 0.05(2x) + 0.10(x+2x)
solving for 'x' we have x=521
2*521 = 1042
(521 + 1042) = 1563
there are 521 pennies, 1042 nickels and 1563 dimes