Question

How many words beginning with T and ending with E can be made (with no letter repeated) out of the letters of the word 'TRIANGLE' ?

• A. 1440
• B. $^8C_6$
• C. 720
• D. 722

Answer 1

Answer: (C)

720

Answer 2

In 'TRIANGLE' there are 8 letters. T- - - - - - E, remaining 6 letters which can be arranged by 6! ways = 6 . 5 . 4 . 3 . 2 . 1 = 720.