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How many different combinations can be made from $(x+2)$ things taken $x$ at a time?

$(x+2)(x+1) / 2$

Intro Stats / AP Statistics

Chapter 4

Probability and Counting Rules

Section 4

Counting Rules

Sampling and Data

Probability Topics

Edarlyn A.

March 20, 2021

The presidents, vice presidents and secretary-treasurers from each of four classes are eligible

Temple University

University of St. Thomas

Idaho State University

Lectures

0:00

00:27

How many combinations of f…

00:30

In how many different ways…

00:40

00:10

How many distinguishable p…

01:42

How many permutations are …

00:32

How many ways are there to…

01:19

In how many ways can 5 dif…

00:39

00:42

In how many ways can the l…

01:18

How many different permuta…

01:36

How many arrangements can …

00:14

01:01

In how many ways can a set…

00:11

02:49

Stacking Boxes In how many…

01:33

These problems involve dis…

01:10

How many different-appeari…

05:36

01:32

here. We had to find her. The number off combinations which can be formed express two things at extinct. Stick it at a time. Now we will write a boast treatment in expression form that is expressed to be X. It looks like and we are so n p. R is. This is a formula to find out. The number of permutations can be formed at any objects they can at all objects at a time. And we are equal toe in factorial divided by n minus R. Factorial here, an equal toe X place to are equal to X. Now we will put them all use off. Any are in the formally we'll get in. Factory is expressed to factorial and minus r factorial is expressed to and minus art is X factorial express to factorial is express to into express one Here we are doing and in tow n minus one in two in minus two and until and unless it's still one one, do it by we can cancel these two x so two factorial express to into explicit swon factorial do it and by to these men you vis can be formed

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