SOLUTION: a piggy-bank contains a certain number of coins. of which, 53 are dimes and 19 are nickels. the remainder of the coins are quarters. if the probability of selecting a quarter fro
Algebra.Com
Question 667806: a piggy-bank contains a certain number of coins. of which, 53 are dimes and 19 are nickels. the remainder of the coins are quarters. if the probability of selecting a quarter from this bank is 1/4, how many quarters does the bank contain?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a piggy-bank contains a certain number of coins. of which, 53 are dimes and 19 are nickels. the remainder of the coins are quarters. if the probability of selecting a quarter from this bank is 1/4, how many quarters does the bank contain?
----
Let "q" be the number of quarters.
P(pick a quarter) = q/(53+19+q) = 1/4
-----
q/(72+q) = 1/4
-----
72+q = 4q
3q = 72
q = 24 (# of quarters)
===========================
Cheers,
Stan H.
================
RELATED QUESTIONS
Your piggy bank has 50 coins worth a total of $4.55. The coins are only nickels and... (answered by Fombitz)
a piggy bank contains seventeen coins with a total of $1.15. If the coins are all nickels (answered by Alan3354)
a piggy bank contains 24 coins,all of which are nickels,dimes and quarters.If the total... (answered by josmiceli)
A piggy bank contains $2 made from 24 coins which are nickels, dimes and quarters. What... (answered by Theo)
A child's piggy bank contains nickels, dimes, and quarters. There are twice as many... (answered by jorel1380)
A piggy bank contains nickels, dimes and quarters. There are three times as many dimes as (answered by richwmiller)
A child’s piggy bank contains 35 coins and a total of $6.25. The bank contains... (answered by ikleyn)
A piggy bank contains 20 coins, consisting of nickel and dimes. How many of each type of (answered by ankor@dixie-net.com)
Adam's piggy bank contains dimes and nickels, for a total of 236 coins. The contents are... (answered by Fombitz)