Thread: [SOLVED] number of ways

Section 6 #8

There are 6 different ways to arrange the 3 letters E,F, and F in a row from left to right. HOw many more ways are there to arrange the 4 letters D,E,F,G in a row from left to right?

The correct answer is 18. Any tips? Thanks in advance

Simple

For D,E,F,G

There will be 4!( 4x3x2x1) ways to be arranged and so 24 and the question is asking how many more ways so 24-6=18

At the end did you learn factorials