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Mathematics 15 Online
OpenStudy (anonymous):

How many 3-letter code words are possible using the first 6 letters of the alphabet if no letter can be repeated?

OpenStudy (anonymous):

a 150 b 120 c 125

ganeshie8 (ganeshie8):

|dw:1395260227946:dw|

ganeshie8 (ganeshie8):

first letter can be any one of 6 letters : 6 ways

ganeshie8 (ganeshie8):

similarly second letter can be chosen in : 6 ways and third letter can be chosen in : 6 ways

OpenStudy (anonymous):

its 120

ganeshie8 (ganeshie8):

so total words possible = ?

OpenStudy (anonymous):

120?

ganeshie8 (ganeshie8):

|dw:1395260329842:dw|

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