A multiple choice test contains 10 questions. There are 4 possible answers for each question.
1. How many ways a student can answer if all questions must be attempted?
2. How many ways a student can answer if he is allowed to leave the answers blank?

Question

A multiple choice test contains 10 questions. There are 4 possible answers for each question. 
1. How many ways a student can answer if all questions must be attempted?
2. How many ways a student can answer if he is allowed to leave the answers blank?

zarkon · Answer

1)4^10
2)5^10

anonymous · Answer

Thanks!
I got 4^10
But how you calculated 5^10?

zarkon · Answer

there are 5 choices for each question.... the four normal choices + the non-answer choice

anonymous · Answer

Gotcha!! :)