Posted by Shawn on Wednesday, September 15, 2010 at 10:41pm.
selecting three (3) coins, but assume that there are 5 dimes, 4 nickels, and 2 quarters.
In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?

math  Reiny, Wednesday, September 15, 2010 at 10:58pm
The only possible cases are, hope I did not miss any
DDD  30
DDN  25
DDQ  45
DNN  20
DNQ  40
DQQ  60
NNN  15
NNQ  35
NQQ  55
How many of these amount to at least 25 cents?
(notice that the fact that we have 5 dimes and 4 nickels is of no consequence, since we can use at most 3, but the 2 quarters limits the cases)
Answer This Question
Related Questions
 Math  Select three (3) coins, but assume that there are 4 dimes, 4 nickels, and...
 math  Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 ...
 Math  Assume that you have 7 dimes and 5 quarters (all distinct), and you ...
 math  Jo has 37 coins (all nickels, dimes and quarters) worth $5.50. She has 4 ...
 math  When a child breaks open her piggy bank, she finds a total of 76 coins, ...
 Math  Tammy wants to get change for 30 cents. The only coins she can get are ...
 Algebra  A coin collection contains 30 coins in nickels, dimes, and quarters. ...
 Math  Ruthie has 10 coins, all either nickels, dimes, or quarters. She has N ...
 Algebra  Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...
 Algebra  Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...
More Related Questions