The Minimum sample size table is attached below
Answer:

Step-by-step explanation:
From the question we are told that:
Confidence Interval 
Variance 
Generally going through the table the
Minimum sample size is

<em>So</em><em> </em><em>the</em><em> </em><em>ans</em><em> </em><em>is</em><em> </em><em>C</em><em>.</em><em> </em>
<em>hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>
The answer is 75/5 * 1/3 because 75/5 is the price of 1 shirt, and 1/3 but I don't know how it's 1/3. I got 75/5 * 3 but the closest answer was C.
Hope this helped☺☺
missing number is 8. there is a pattern with the input and output numbers.