Answer:
70
Step-by-step explanation:
To find the quartiles of a data-set, we must first split the data through the middle.
This puts 50, 70, and 90 on the left.
And 110, 30, and 150 to the right.
The quartiles would be the median of these (3) numbers.
Since we are finding the Lower Quartile, we find the median of
50,70 and 90.
It will be 70.
