At Lions High school 100 students are taking chemistry and 80 students are taking Biology. If 20 students are taking both chemistry and Biology , what is the ratio of the students taking only chemistry to the number taking only Biology?
A. 3/4
B. 4/3
C. 5/4
D. 1/4
সঠিক উত্তরঃ
B.
4/3
Explanation:
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