Single And Compound Events

Single And Compound Events

Lesson 1

Problem: How many different 6-letter arrangements are there of the letters in the word FOCUS?

Step 1: There are total five letter positions;

At first place any of the five letters can be placed

Step 2: At second place any letter can be placed from the remaining four letters and so on.

Solution So total possible arrangements are 6 x 5 x 4 x 3 x 2 x 1 = 6! = 720

Step 3:

Solution The answer is: 720

Step 4:

Complete

Try two practice problems:

Do the following:

How many different 4-letter arrangements are there of the letters in the word FEAR?

How many different three-digit numerals can be written using all of the following three digits: 7, 8, 5.