A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
I have some questions regarding combinations in finite. Here is my first one I am stumped on:
Select 3 coins, but assume that there are 5 dimes, 3 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?_______________________________
Any help? Formulas have not done me so well
anonymous
 4 years ago
I have some questions regarding combinations in finite. Here is my first one I am stumped on: Select 3 coins, but assume that there are 5 dimes, 3 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?_______________________________ Any help? Formulas have not done me so well

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i think you have to grind it til you find it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0oh good so i am less embarrassed. you have to work in cases

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i have tried a number of times but cant solve it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0cant break down the cases correctly

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.01) two quarters one dime only one way to select two quarters, 5 choices for the dime, so 5 in that case 2) two quarters one nickel, 3 choices for the nickel so 3 ways in that case

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.03) one quarter two dimes \[2\times \dbinom{5}{2}=2\times 10=20\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.04) one quarter two nickels \[2\times 3=6\] 5) one quarter one dime one nickel \[2\times 3\times 5=30\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and finally two dimes and a nickel \[10\times 3=30\] think that is all, so if we add them up we should get the right answer

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@zarkon, you got a snap way to do this, or it it just grind it out?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0wow i did not break the cases down enough I will check and see if it is right

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0damn i forgot 3 dimes!!

Zarkon
 4 years ago
Best ResponseYou've already chosen the best response.2I do have a quicker way...but it is goog to do it this way...you also nee 3 dimes I believe

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I will try to add them up and see

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0add another 10 what is the quick way for my benefit

Zarkon
 4 years ago
Best ResponseYou've already chosen the best response.2which gives a total of 104

Zarkon
 4 years ago
Best ResponseYou've already chosen the best response.2you can also look at it this way...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0now i get to learn something

Zarkon
 4 years ago
Best ResponseYou've already chosen the best response.2there are \[_{10}C_{3}=120\] ways to pick the 3 coins... only NNN and 2nickles and a dime are less than 25 cents 120115=104

Zarkon
 4 years ago
Best ResponseYou've already chosen the best response.2I don't see a way to do it without some cases

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0these few are killing me

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes well that would really be magic

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thank you so much I have some more that I am stumped as well if you want to crack them

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0post a new thread, you will get lots of answers i am sure
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.