There are 10 students participating in a spelling bee. In how many ways can the students who go first and second be chosen?

Solution:

Given there are 10 students participating in a spelling bee.

This can be solved using permutations

Permutations are different ways of arranging objects in a definite order.

The first person can be chosen anyone among the 10 students in 10 ways

There are 9 remaining after selection of first person, we can choose anyone from the 9 students in 9 ways.

Therefore, we can choose in 10*9 = 90ways

There are 10 students participating in a spelling bee. In how many ways can the students who go first and second be chosen?

Summary:

There are 10 students participating in a spelling bee. In 90 ways can the students who go first and second be chosen