The ratio of the total number of students scoring marks less than 50% to that of scoring marks exactly 50% is:

School	Number of students scoring marks less than 50%	Percentage of students scoring marks more than 50%	Number of students appeared
A	270	55	600
B	120	40	400
C	300	20	375
D	220	10	350
E	200	25	300

Study the above table and answer the question.