how many different 6 symbol arrangments?

Calculus
Tutor: None Selected Time limit: 1 Day

how many different 6-symbol arrangements can be made if the first 3 must be from the letters x,y,z and the last three must be from the digits 4,5,6 (no repeats)? 

Jun 2nd, 2015

Thank you for the opportunity to help you with your question!

xyz456------456 has 6 kinds

yxz456------456 has 6 kinds

zxy456------456 has 6 kinds

xzy456------456 has 6 kinds

yzx456------456 has 6 kinds

zyx456------456 has 6 kinds

so 6*6=36 different arrangements in total. 

Or C33 * C33=(3*2*1)^2=36


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Jun 2nd, 2015

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Jun 2nd, 2015
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Jun 2nd, 2015
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