MCQ
The median of first $8$ prime numbers is :
- A$7$
- ✓$9$
- C$11$
- D$13$
✓
Answer
Correct option: B.
$9$
First $8$ prime numbers are are follows :
$2, 3, 5, 7, 11, 13, 17, 19$
$N = 8\ ($even$)$
$\therefore$ Median $=\frac{\Big(\frac{8}{2}\Big)^{\text{th}}\text{value}+\Big(\frac{8}{2}+1\Big)^{\text{th}}\text{value}}{2}$
$=\frac{4^{\text{th}}\text{value }+\ 5^{\text{th}}\text{Value}}{2}$
$=\frac{7+11}{2}$
$=\frac{18}{2}$
$=9$
$2, 3, 5, 7, 11, 13, 17, 19$
$N = 8\ ($even$)$
$\therefore$ Median $=\frac{\Big(\frac{8}{2}\Big)^{\text{th}}\text{value}+\Big(\frac{8}{2}+1\Big)^{\text{th}}\text{value}}{2}$
$=\frac{4^{\text{th}}\text{value }+\ 5^{\text{th}}\text{Value}}{2}$
$=\frac{7+11}{2}$
$=\frac{18}{2}$
$=9$
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