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

You might be interested in

Hello :) <br> Please help me solve this <br><br> Explain answer

kykrilka [37]

Answer:

B because the rotation of the wheel doesn't change the angle of the spokes.

7 0

3 years ago

Diana had 41 stickers she put them in 7 equal groups she put as many as possible in each groups she gave the leftover stickers t

pogonyaev

Udjejejjejejejejejwkdjrjdkjdhfkndbdbf
Lol just trying to be weird

4 0

3 years ago

Read 2 more answers

Seven cereal bars are shared equally by 3 students. How many does each student receive?I really need help and my teacher won't h

Katarina [22]

Answer:

Each student gets 2 1/3

Step-by-step explanation:

So you would divide 7 by 3, which you can't...so 6 divided by 3 is 2, and when you split the last one into thirds you can each have 1/3. Add the sections together, and each person gets 2 1/3

7 0

3 years ago

1/a+2/b+3/c; Express as a single fraction.

Anika [276]

Answer: (bc+2ac+3ab)/(abc)

8 0

3 years ago

Read 2 more answers

Pam and her brother both open savings accounts. Each begin with a balance of zero dollars. For every two dollars that Pam save i

dezoksy [38]

Answer:

Ratio [Pam to her brother] = 2:5

Step-by-step explanation:

Given:

Pam saves every two dollar

Her brother saves fives dollar (For every two dollar)

Find:

Ratio [Pam saving and his brothers saving]

Computation:

It is given that if Pam saves $2 her brother saves $5

So,

Ratio [Pam to her brother] = 2/5

Ratio [Pam to her brother] = 2:5

6 0

3 years ago