Question

A man has 2 pennies, 3 nickels, 1 dime and 2 quarters. How many different sums of money can he make using one or more of these 8 coins?
A) 8
B) 12
C) 47
D) 77

Answer 1

n!/(n1! n2! n3! ... nk!) i believe so

Answer 2

8!
---------
2! 3! 1! 2!

Answer 3

What are the exclamation points for though?

Answer 4

8.7.6.5.4.3.2.1
--------------
2.1.3.2.1.1.2.1


8.7.6.5.4.3.2
------------
2.3.2.2


8.7.6.5 = 56.30

56
30
----
1680 .... maybe not lol

Answer 5

its factorial notation; 5! means 5*4*3*2*1

Answer 6

oh

Answer 7

i get a number that is not one of your options, so im a little leary if I remember it correctly

Answer 8

its ok =]

Answer 9

I'm pretty sure it isn't 8 or 12 though.

Answer 10

yeah, those are a bit small ...

Answer 11

I've tried going through it the long way, but I stopped once I realized 77 was a choice.

Answer 12

5 5 5
25 25
1 1
10

8 coin; 77
7 coin; 76 72 67 52
6 coin; 75 71 66 62 42 27
5 coin: 70 65 61 57 50 46 41 26 22 17

1 coin; 1 5 10 25
2 coin; 2 6 11 15 30 35
3 coin; 7 12 20 31 51 60
4 coin; 16 32 36 40 56


i prolly miscounted someplace but I got 42 and thats prolly pretty close

Answer 13

oh.. thank you =]