Type your answers in the blanks and click Submit.
Question 2
Reverse the rule. Use the formula 
to find the probability of choosing a duck with a perfect square, given that you choose a duck with an even number.
Type your answers in the blanks and click Submit.
Question 2
Reverse the rule. Use the formula to find the probability of choosing a duck with a perfect square, given that you choose a duck with an even number.
which is 
.