The number of ways in which any four letters can be selected from the word 'CORGOO' is :
The number of ways in which any four letters can be selected from the word 'CORGOO' is_______.
The number of ways in which any four letters can be selected from the word "EXAMINATION” is ______.
The number of ways in which any four letters can be selected from the word "EXAMINATION” if two letters are alike and other two are distinct.