Hello!
To find the first quartile you first have to find the median
6, 7, 15,36, 41, 43, 47, 49
The medians are 36 and 41
You take the average of these number
36+ 41 = 77
77 / 2 = 38.5
The median is 38.5
To find the first quartile you find the median of the numbers less than the median
List the numbers less than 38.5
6, 7, 15, 36
The medians are 7 and 15
Take the average to get the median
7 + 15 = 22
22 / 2 = 11
The First quartile is 11
The answer is 11
Hope this helps!