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The table shows the percentage of marks obtained by seven students in six different subjects in an examination. The numbers in the brackets are the maximum marks in each subject. Student Subject (Max. Marks) Maths (150) Chemistry (130) Physics (120) Geography (100) History (60) Computer Science (40) A 90 50 90 60 70 80 B 100 80 80 40 80 70 C 90 60 70 70 90 70 D 80 65 80 80 60 60 E 80 65 85 95 50 90 F 70 75 65 85 40 60 G 65 35 50 77 80 80 What are the average marks obtained by all the seven students in Physics? (Correct to two decimal places)

The table shows the percentage of marks obtained by seven students in six different subjects in an examination. The numbers in the brackets are the maximum marks in each subject. Student Subject (Max. Marks) Maths (150) Chemistry (130) Physics (120) Geography (100) History (60) Computer Science (40) A 90 50 90 60 70 80 B 100 80 80 40 80 70 C 90 60 70 70 90 70 D 80 65 80 80 60 60 E 80 65 85 95 50 90 F 70 75 65 85 40 60 G 65 35 50 77 80 80 What are the average marks obtained by all the seven students in Physics? (Correct to two decimal places) Correct Answer 89.14

Total number obtained by A in Physics = 120 × 90/100 = 108

Total number obtained by B in Physics = 120 × 80/100 = 96

Total number obtained by C in Physics = 120 × 70/100 = 84

Total number obtained by D in Physics = 120 × 80/100 = 96

Total number obtained by E in Physics = 120 × 85/100 = 102

Total number obtained by F in Physics = 120 × 65/100 = 78

Total number obtained by G in Physics = 120 × 50/100 = 60

Total number obtained by all seven students in Physics = 108 + 96 + 84 + 96 + 102 + 78 + 60 = 624

Required average = 624/7 = 89.14

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The table shows the percentage of marks obtained by seven students in six different subjects in an examination. The numbers in the brackets are the maximum marks in each subject. Student Subject (Max. Marks in percentage) Maths (150) Chemistry (130) Physics (120) Geography (100) History (60) Computer Science (40) A 90 50 90 60 70 80 B 100 80 80 40 80 70 C 90 60 70 70 90 70 D 80 65 80 80 60 60 E 80 65 85 95 50 90 F 70 75 65 85 40 60 G 65 35 50 77 80 80   What are the average marks obtained by all the seven students in Mathematics? (Correct to two decimal places)
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