Study the following line graph carefully and answer the question below.
Given graph represents marks obtained by Riya and Rida in six subjects of 12th exam of CBSE. Maximum marks in Maths, Physics and Chemistry is 140 whereas maximum marks in English. IP and Biology is 180.
What is percentage marks obtained by Rida in PCM (Maths, Physics and Chemistry)?
1
50%
2
78.57%
3
71.43%
4
81.32%