Answer:
C.Thirty percent of the students earned a B.
Explanation:
Let us go through each of the answer choices one by one.
A.Alex said more students earned an A or a D than a B or a C.
The total number of students that earned an A or a D is less than 50%. This is becasue the combined area of A and D is less than half of the circle. However, the total number of students who earned either a C or a B is greater than 50%.
Therefore, the statement that more than students earned an A or a D than a B or a C is wrong.
B.Fifty per cent of the class earned an A or a B.
The combined area of A and B is more than 50%. Therefore, the statement that 50% of the class earned an A or a B is false.
C.Thirty per cent of the students earned a B.
Thirty per cent is about 1/3 of the area of the circle. Now looking at the pie chart, we see that the area of b is almost 1/3 of the whole circle. Therefore, the statement that Thirty per cent of the students earned a B is can be true.
D.Twenty-five percent of the students earned a D.
Twenty-five percent is about 1 /4 of a circle.
Now looking at the pie chart we see that the area of D is not anywhere near 25% of the area of the circle. Therefore, the statement that Twenty-five per cent of the students earned a D. is false.