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LekaFEV [45]
3 years ago
5

In the expression ab, a is called the base and bis called the numerator or power.

Mathematics
1 answer:
baherus [9]3 years ago
4 0
It is called the power
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A box has five items, three good and two defective. three items are selected at random without replacement. let x be the number
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This problem can be solved from first principles, case by case.  However, it can be solved systematically using the hypergeometric distribution, based on the characteristics of the problem:
- known number of defective and non-defective items.
- no replacement
- known number of items selected.

Let
a=number of defective items selected
A=total number of defective items
b=number of non-defective items selected
B=total number of non-defective items
Then 
P(a,b)=C(A,a)C(B,b)/C(A+B,a+b)
where 
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A+B=total number of items
a+b=number of items selected

Given:
A=2
B=3
a+b=3
PMF:
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P(2,0)=C(2,2)C(3,1)/C(5,3)=1*3/10=3/10
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Therefore the 
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7 0
2 years ago
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