Question

The median of the following observations arranged in ascending order is 13. Find the value of X: 3, 7, 8, x+1, x+3, 12, 15, 18
pls answer fast

Answer 1

Total no. of observations , n = 8

We observe that his even
So, Median =
$\frac{1}{2} ( \frac{n}{2} th \: term \: + ( \frac{n}{2} + 1)th \: term)$
=> 1/2(8/2 th term + (8/2 + 1) th term)
=> 1/2(4th term + 5th term)
=> 1/2(x+1+x+3)
=> 1/2(2x+4)
=> x+2

=> x+2 = 13
=> x=11