Question

A history teacher gives a 19-question true-false exam. In how many ways can the test be answered if the possible answers are T or F or possibly to leave the answer blank?

Answer 1

There are 19 true or false questions. Therefore there are 19 options for true, 19 options for false, and 19 options to leave each question blank. So 19 + 19 + 19 = 57. There are 57 possibilities to answer (or leave blank) the questions.

Answer 2

38 because there are 2 choices true or false so if there are 19 questions each question would have 2 choices and if selected both same with all the other ones if there are 19 questions each and 2 choices for each question then multiply it by 19*2 and you get 38. Simple!