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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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Step-by-step explanation:

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3 years ago
A bag contains 4 blue balls, 7 yellow balls and 4 white balls. Event A is defined as drawing a blue ball on the first draw and e
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P(B|A) expressed in simplest form is  8/105.

<h3>What is the probability?</h3>

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2 years ago
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Step-by-step explanation:

7 0
3 years ago
The area of a rectangle is 7.35m squared . The width is 2.1 m.<br> What is the length?
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this is easy. so take the equation used for finding the area (A = LW). you then place the sizes in the proper places (making 7.35 = 2.1L). now all you have to do is divide 7.35 (area) by 2.1 (width) to get your length (3.5).

Step-by-step explanation:

7.35 = 2.1L

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