Maggie had $4 in her wallet. If this is 16% of her monthly allowance, wha is her monthly allowance?
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The joint distribution of the numbers of the three colours in the sample without replacement is:
Let consider A, B, and C to denote the three variables that are black, white, and red balls in the sample.
i.e.
- n = A + B + C
Now, the numbers of ways 'n' balls are chosen without replacement in an urn that comprises of p black balls, q white balls, and r red balls can be computed as follows:
Now, the number of ways whereby A black balls can be chosen from p black balls is expressed as:
The number of ways whereby B white balls can be chosen from q white balls is expressed as:
The number of ways whereby C red balls can be chosen from r red balls is expressed as:
Therefore, we can conclude that the joint distribution of the numbers of the three colours in the sample without replacement is:
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