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Luba_88 [7]
3 years ago
5

THERE ARE 6 BOOKS ON A READING LIST. STUDENTS MUST READ ANY 3 OF THE BOOKS ON THE LIST. IN HOW MANY WAYS CAN A STUDENT SELECT AN

Y 3 BOOKS?
Mathematics
1 answer:
aksik [14]3 years ago
3 0
To solve this problem, you must use the Combination Formula:
 
 Cr(n,r)=n! /r!(n-r)!
 
 n: The number of things it can be chosen (n=6).
 r: The number of things you choose (r=3).
 !: The symbol of The Factorial Function, which means that descending numbers are multiplied.
 
 In Combinations the order of the objects does not matter, so we have:
 
 Cr(n,r)=n!/r!(n-r)!
 C(6,3)=6!/3!(6-3)!
 C(6,3)=6!/3!
 C(6,3)= 6x5x4x3!/3x2x1x3!
 C(6,3)=6x5x4/3x2x1
 C(6,3)=120/6
 C(6,3)=20
 
 In how many ways can a student select any 3 books? 
The answer is: In 20 different ways. 
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what is the absolute value of -8? Use the number line to help anwser the question HELP MEEEE A: -16. B= -8 C= 8 D= 16
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3 years ago
A medical researcher needs 37 people to test the effectiveness of an experimental drug. If 101 people have volunteered for the t
Rashid [163]

Answer:

The number of ways to select 37 people from 101 is, 5,397,234,129,638,871,133,346,507,775.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

{n\choose k}=\frac{n!}{k!\cdot (n-k)!}

Compute the number of ways to select 37 people from 101 as follows:

{101\choose 37}=\frac{101!}{37!\cdot (101-37)!}

        =\frac{101!}{37!\times 64!}\\\\=\frac{101\times 100\times 99\times....64!}{37!\times 64!}\\\\=5397234129638871133346507775

Thus, the number of ways to select 37 people from 101 is, 5,397,234,129,638,871,133,346,507,775.

5 0
3 years ago
he graph below represents the price of sending video messages using the services of a phone company. What is the constant of pro
Colt1911 [192]

Answer:

24.

Step-by-step explanation:

Basically constant of proportionality is a ratio.

We take two points, we'll take the order pair (2,48)

It will always be y/x so y is 48 and x is 2

48/2    -  now we simplify

answer: 24

hope this helps! :))

8 0
3 years ago
Read 2 more answers
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