Question

a true or false test has five questions if you guess the answers what is the probability that you will get exactly four corret?

Answer 1

You have a 1/2 chance of getting any question right or wrong. If you want 4 right questions and 1 wrong question, the probability would be:

$\frac{1}{2}^4*\frac{1}{2}=\frac{1}{2}^5=\frac{1}{32}$