1. 4 students are running for club president in a club with 50 members. How many different vote counts are possible, if all 50 members are required to vote?

2. 4 students are running for club president in a club with 50 members. How many different vote counts are possible, if members may choose not to vote?

Mellie
Apr 30, 2015

#1**0 **

I think that this is very like this question

You told me my last one was wrong so i don't know. sorry.

When you find the answer can you tell us please ?

Melody
May 3, 2015

#2**0 **

Yes, but only when I get the whole question wrong three times, will I be able to get it OR if I get the question right. I don't know what to do, because if I get it wrong, my report for the week will be very bad :(

Mellie
May 3, 2015

#4**+6 **

I think

the number of ways that n identical votes can be distibuted to k people (assuming that each person gets at least one vote = $$\binom{n+k-1}{n}$$

1. 4 students are running for club president in a club with 50 members. How many different vote counts are possible, if all 50 members are required to vote?

I am going to assume that everyone gets at least 1 vote.

(50+4-1)C50 = 53C50

$${\left({\frac{{\mathtt{53}}{!}}{{\mathtt{50}}{!}{\mathtt{\,\times\,}}({\mathtt{53}}{\mathtt{\,-\,}}{\mathtt{50}}){!}}}\right)} = {\mathtt{23\,426}}$$

2. 4 students are running for club president in a club with 50 members. How many different vote counts are possible, if members may choose not to vote?

I think this assumes that they all get at least 1 vote and at least 1 does not vote at all

(50+5-1)C50 = 54C50

$${\left({\frac{{\mathtt{54}}{!}}{{\mathtt{50}}{!}{\mathtt{\,\times\,}}({\mathtt{54}}{\mathtt{\,-\,}}{\mathtt{50}}){!}}}\right)} = {\mathtt{316\,251}}$$

If some people get no votes it would be higher - does it need to be worked out that way?

Ref:

http://web.eecs.utk.edu/~booth/311-04/homeworks/hw2sol.pdf Question 4

http://euclid.ucc.ie/pages/MATHENR/Exercises/CombinatoricsRepetitionsConditions.pdf

Melody
May 3, 2015

#5**+9 **

Best Answer

Melody, I agree with your answers –both of them.

I’m Nauseated BTW -- The Troll, not my physical condition.

The network connection keeps dropping out, it connects for less than a minute; I can’t login. I’ve tried to post just this over 15 times.

Guest May 3, 2015

#6**+4 **

Thanks Nauseated,

I am actually wondering if my first answer - which I nutted out without a formula was also correct.

It started with a different premise - that a child could get no lollies, that may be the only reason it was 'wrong'.

If it was correct then I would have reason to be very pleased with myself.

I guess I will never know

Melody
May 3, 2015