Hi, Respected M'am! Could please solve this question ASAP. Q: Marks on a CSS exam were normally distributed with a mean of 60 and a variance of 36. a. Find the probability that a randomly selected CSS...

Hi, Respected M'am!

Could please solve this question ASAP.

Q:
Marks on a CSS exam were normally distributed with a mean of 60 and a variance of 36.

a.
Find the probability that a randomly selected CSS exam will have a mark of at least

66?

b.
What percentage of CSS exams will have marks between 48 and 51?

c. If the top 3.92% of CSS marks receive merit awards, what is the lowest mark eligible

for an award?

d.
If there were 334 CSS exams with marks of at least 69, how many students took the

exam?