Question

The median of first 12 prime numbers is

• A. 13
• B. 14
• C. 15
• D. 17

Answer 1

Answer: (C)

15

First 12 prime numbers are
2,3,5,7,11,13,17,19,23,29,31,37
Number of observations are even =12
So,median =$\frac{{\left(\frac{n}{2}\right)}^{th}obs+{(\frac{n}{2}+1)}^{th}obs}{2}$
median=$\frac{{\left(6\right)}^{th}obs+{\left(7\right)}^{th}obs}{2}$
median =$\frac{13+17}{2}=\frac{30}{2}=15$