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3 years ago

Find the value of the combination. 21 C 3 7,980 2,660 1,330

1 answer:

4 0

To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330

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Using a proportional relationship, the ordered pair that is a solution if x represents the number of days that a library book is late and y represents the total fee is:

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<h3>What is a proportional relationship?</h3>

A proportional relationship is a function in which the output variable is given by the input variable multiplied by a constant of proportionality, that is:

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For this problem, each day, the free is increased by $0.3, hence the constant is k = 0.3 and the function is:

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Then after three days, the total fee is:

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More can be learned about proportional relationships at brainly.com/question/28291848

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