How many 6 digit telephone numbers can be formed if each number starts with 35 and no digit appears more than once?
Correct Answer : D
In how many different ways can 5 girls and 5 boys form a circle such that the boys and the girls alternate?
A question paper has two parts P and Q, each containing 10 questions. If a student needs to choose 8 from part P and 4 from part Q, in how many ways can he do that?
An event manager has ten patterns of chairs and eight patterns of tables. In how many ways can he make a pair of table and chair?