Question 9
A die has six faces numbered 1,2,3,4,5,6. Peter rolls it twice. Find the probability that the sum is (a) an even number; (b) a prime number.
Use the standard probability model: the die is fair and the two rolls are independent. Give both answers, labelled (a) and (b).
Use the standard probability model: the die is fair and the two rolls are independent. Give both answers, labelled (a) and (b).