SOLUTION: a question paper has 8 questions with 4 options per question.in how many ways can one or more of those questions be attempted?

Algebra ->  Permutations -> SOLUTION: a question paper has 8 questions with 4 options per question.in how many ways can one or more of those questions be attempted?       Log On


   

Question 888509: a question paper has 8 questions with 4 options per question.in how many ways can one or more of those questions be attempted?

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
There are five ways to answer each question (one each for the options, and to leave the question blank).

Hence there are 5*5*...*5 = 5^8 ways to answer the questions. However we have to subtract 1 to account for not attempting any question. Ans = 5^8 - 1