Question

Median of 3.89,2.50,2.99

Answer 1

The median is the number in the middle. But, first it must in ascending order:
$2.5, 2.99, 3.89$

So, the middle number is 2.99. That's your answer.

Answer 2

The median is the number in the middles so lets arrange them.

2.50,2.99,3.89

The median is 2.99

Hope this helps :^)