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Problem 1)
We have 20 kinds of presents; and we have a large supply of each kind.
We want to give presents to 12 children.
It is not required that every child gets something; but no child can get 2 copies of the same present.
In how many ways can we give presents?
Problem 2)
List all subsets of {a,b,c,d,e} containing {a.e} but not containing c
Please for problem 2, dont just give me the answer, I can find it. What I cannot find though is a general answer. Here it seems more complicated.for {a.e} it doesn't seem to be just "from 5 objects choose 2" because we don't choose 2 random objects, but two particular objects.
In algebra, we often have to solve simultaneous differential equations. If the equations are linear and independent, there is a unique solution when the number of equations equals the number of variables.
Band members at Colchester Middle School are expected to average at least 20 min of practice time per day. One week Monroe practiced 15 min, 28 min, 30 min, 0 min, 15 min, and 25 min. How long must he practice on the seventh day if he is to meet e..
What was the percentage increase in motor vehicle production in countries outside the United States from 1950 to 1997?
A six-digit integer is formed by placing two 3-digit integers side by side. If the larger of the two integers is placed ahead of the smaller integer, the number formed is six times greater than if the smaller integer is placed ahead of the larger ..
diane works at a public university. she contributes 625 at the end of each month to her retirement fund. for the past
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What are the methods to solve quadratic equations? Discuss at least two different methods to solve such equations.
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