Answer:
B
Step-by-step explanation:
look to the picture of my answer.
Median = 13
Arranging it in ascending order:
=> 2,4,6,10,13,13,14,16,20
Median is the middlemost no.
So,
=> Median = 13
r⁻⁸ s⁻⁵
using the rule x⁻ⁿ=1/xⁿ
r⁻⁸ s⁻⁵ = (1/r⁸)(1/s⁵)