The third option i think BTW if you don’t know an awnser always chose C
Original price = $20
Markup percentage = 65
Markup amount = 0
What is the profit?
65% of 20 = $12
Therefore Markup amount = $12
Profit = Original price + markup amount
= $20 + $12
= $32
I think it is b but wait till someone else answers to
Let 
be the random variable for the number of marks a given student receives on the exam.
10% of students obtain more than 75 marks, so
where 
follows a standard normal distribution. The critical value for an upper-tail probability of 10% is
where 
denotes the CDF of , and 
denotes the inverse CDF. We have
Similarly, because 20% of students obtain less than 40 marks, we have
so that
Then 
are such that
and we find
I Think The answer is c I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you
