Consumers spend an average of RM21 per week in cash without being aware of where it goes Assume that the amount of cash spent without being aware of where it goes is normally distributed and that the...

Consumers spend an average of RM21 per week in cash without being aware of where it goes Assume that the amount of cash spent without being aware of where it goes is normally distributed and that the standard deviation is RM5.

a. What is the probability that a randomly selected person will spend more than RM25?

b. What is the probability that a randomly selected person will spend between RM10 and
RM20?