Study the following bar graph carefully to answer the questions.
What is the respective ratio between the total marks obtained by Q and S together in Chemistry to the total marks obtained by P and R together in Physics ?
Total marks obtained by Q and S together in Chemistry = 110 + 120 = 230
Total marks obtained by P and R together in Physics = 130 + 80 = 210
=> Required ratio = 230 : 210 = 23 : 21
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