Showing posts with label Group. Show all posts
Showing posts with label Group. Show all posts

How many women were in the group and how much was the speaker paid?

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Question by maddie: How many women were in the group and how much was the speaker paid?
A group of women decided to contribute equal amounts toward obtaining a speaker for a book review. If there were 10 more women, each would have paid 2 dollars less. However if there were 5 less women, each would have paid 2 dollars more. How many women were there and how much was the speaker paid?


Best answer:

Answer by bdwolfhound
Let there be n women paying $ q each.........

Total paid = $ nq

(n+10)(q-2) = nq +10q-2n-20 = $ nq; 10q-2n = 20

(n-5)(q+2) = nq - 5q +2n -10 = $ nq; - 5q +2n =10 Multiply by 2 and add to the above expression

10q - 2n = 20
-10q+4n = 20
------------------
2n = 40
n = 20 and q = $ 6, so nq =$ 120



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Related How Many Were Articles

A committe of size five is selected from a group of ten clowns and twelve lion tamers. How many are possible?

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Question by Sonja: A committe of size five is selected from a group of ten clowns and twelve lion tamers. How many are possible?
A committe of size five is selected from a group of ten clowns and twelve lion tamers.
How many different committees are possible?
How many committees are possible IF there must be exactly two clowns on the committee?
How many committees are possible if lion tamers must outnumber clowns on the committee?


Best answer:

Answer by M3
How many different committees are possible?
22c5 = 26334

How many committees are possible IF there must be exactly two clowns on the committee?
10c2*12c3 = 9900

How many committees are possible if lion tamers must outnumber clowns on the committee?
12c3*10c2 + 12c4*10c1 + 12c5 = 15642



Know better? Leave your own answer in the comments!