In how many ways can the letters of the word 'LEADER' be arranged?

None of these

120

360

720

Correct Answer : C

In how many different ways can 5 girls and 5 boys form a circle such that the boys and the girls alternate?

How many 6 digit telephone numbers can be formed if each number starts with 35 and no digit appears more than once?

How many words can be formed by using all letters of the word 'BIHAR'?