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notsponge [240]
3 years ago
12

If n = 5 and r = 3 Find "Cr.​

Mathematics
2 answers:
Marat540 [252]3 years ago
3 0

Answer:

Cr = 10

Step-by-step explanation:

To calculate combinations we use the nCr formula: nCr = n! / r! * (n - r)!, where n = number of items, and r = number of items being chosen at a time.

C(n,r)=[?]

C(n,r)=C(5,3)

=\frac{5}{(3!(5-3)!)}

=\frac{5!}{3!*2!}

=10

[RevyBreeze]

Lena [83]3 years ago
3 0

Answer:

Pi*r^2

Step-by-step explanation:

If your finding circumfrence the equation is Pi*r^2

So your equation would be 3.14*3^2

So 3^2 would be 3*3=9

Multiply 9 by 3.14

your answer would be 28.26

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8 0
4 years ago
How many cubes of length 2 would it take to fill a rectangular solid with a<br> volume of 120?
elena55 [62]

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3 years ago
Mary is paid $12 per hour at her weekend part-time job. She earns an average of $132 each weekend, but her earnings can vary by
RSB [31]

Given:

Mary is paid $12 per hour at her weekend part-time job.

She earns an average of $132 each weekend, but her earnings can vary by $36.

To find:

The inequality for number of hours.

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Let h be the number of hours Mary could work in one weekend.

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8 0
3 years ago
Marco and Drew stacked boxes on a shelf. Marco lifted 9 boxes and Drew lifted 14 boxes. The boxes that Drew lifted each weighed
belka [17]
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3 0
4 years ago
Read 2 more answers
F(t)=-16t^2+144t. After how many seconds does the toy rocket hit the ground?
Margarita [4]
9 seconds
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Than solve for “t”
t=0 or t=9
And 0 seconds doesn’t make sense so it is 9 seconds
7 0
3 years ago
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