A class of 100 students had their scores represented by both less-than and more-than ogives on the same graph. The cumulative frequencies read from the curves at certain score values are shown below.
Score (x): 45 48 50 55
Less-than cumulative frequency: 40 50 60 75
More-than cumulative frequency : 60 50 40 25
The two ogives intersect at the point (x, 50). What is the median score of the class?
a) 49
b) 48
c) 50
d) 52