SOLUTION: a history teacher gives a 20 question true false exam. in how many ways can the test be answered if the possible answers are true or false or possible to leave the answer blank

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Question 692369: a history teacher gives a 20 question true false exam. in how many ways can the test be answered if the possible answers are true or false or possible to leave the answer blank
Found 2 solutions by partha_ban, Alan3354:
Answer by partha_ban(41) About Me  (Show Source):
You can put this solution on YOUR website!
Each question has 3 possible answers: True, False, Blank.
So 20 questions can be answered in 20%5E3 possible ways.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a history teacher gives a 20 question true false exam. in how many ways can the test be answered if the possible answers are true or false or possible to leave the answer blank
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3^20
= 3,486,784,401 ways