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2 years ago

What is an easy way to remember the difference between nCr and nPr?

Mathematics

1 answer:

Zinaida [17]2 years ago

8 0

<h2>Compare and Contrast</h2>

<h3>What is an easy way to remember the difference between nCr and nPr?</h3>

nCr is the combination while nPr is the permutation. The easy way to remember the difference between nCr and nPr is their formula. The formula for the combination is n!/r! (n - r)! while for the permutation is n!/(n - r)!. Combination is the arrangements of objects in which order does not matter. Permutation is the arrangements of objects in which order matters.

Wxndy~~

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Nataly [62]

Number of rooms left excluding a quarter of 140 is: 105 rooms.

<h3>What is a Quarter of a Number?</h3>

A quarter is one-fourth. A quarter of a number is therefore, one-fourth of that number or 1/4 part of the number.

Therefore, number of rooms cleaned = 1/4(140) = 35.

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2 years ago

Wilma worked 38 hours 52 minutes last week. She earns $25.15 per hour. What is wilma's pay for this work period? Round your answ

Iteru [2.4K]

Answer:

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Step-by-step explanation:

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38.52×$25.15=

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3 years ago

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ale4655 [162]

Answer:

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Trigonometry

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Step-by-step explanation:

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