1.

How many eight-distinct letter words can be formed with the letters of the word “COURTESY” beginning with C and ending with Y?(a) 576 (b) 640 (c) 336(d) 720

Answer»

(d) 720

The first place will always be filled by C and the last place will always be filled with Y. The remaining six places can be filled by the remaining 6 letters in 6P6 ways. 

∴ Total number of words beginning with C and ending with Y = 1 × 1 × 6P6 = 6 ! = 720.



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