The bar heights read from a histogram of test scores out of 50 for 24 students are listed below. Each class has a width of 10 marks.
0–10: 2 units 10–20: 5 units 20–30: 10 units 30–40: 5 units 40–50: 2 units
Which description best fits the shape of this distribution?
a) Skewed to the right
b) Approximately symmetric
c) Skewed to the left
d) Nearly uniform