Which of the following accurately describes the proportions in the tails of a normal distribution?
a) Proportions in the right-hand tail are greater than 0.50, and proportions in the left-hand tail are less than 0.50
b) Proportions in the right-hand tail are less than 0.50, and proportions in the left-hand tail are greater than 0.50
c) Proportions in both tails are less than 0.50
d) Proportions in both tails are greater than 0.50