Question

the collection of Numbers which comprise the data given below is arranged in assending order 3,7,9,N-1,15,18,19,20. if the median of the data is 12.5 what is the value of N​

Answer 1

Answer:

Ans is 11.

Step-by-step explanation:

median = sum of mid terms / 2

here mid terms are = N-1 , 15

[(N-1)+15]/2 = 12.5

(N-1)+15 = 12.5*2

N-1+15 = 25

N+14=25

N=25-14

N=11

so ans is 11.