Question

If you roll a number cube 72 times, how many times do you expect to roll a 6? A 9 B 12 C 11 D 10

Answer 1

B, 12. This is because you have a 1/6 chance to roll a six every time you roll the die. You roll it 72 times, so you multiply 1/6 by 72/1. This equals 72/6, you simplify this to be 12/1.