Question

You have a 5-question, true-false quiz. What is the probability that you choose each answer at random and get 4 of the questions correct?

Answer 1

The probability of getting each question right is 50%, or ½
$\frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} = \frac{1}{2 \times 5} = \frac{1}{10} = 10\%$