Question : Directions: Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.
Option 1: 0.78
Option 2: 0.79
Option 3: 0.77
Option 4: 0.76
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Correct Answer: 0.77
Solution :
Given:
Total number of Subjects→5
Maximum marks in each subject→100
% scored by Ravi in 4 subjects = 80%
Marks scored by Ravi in the 5th subject = 65
From the given information –
Maximum marks in all 5 subjects = 100 × 5 = 500
% scored by Ravi in 4 subjects = 80%
Total marks scored by Ravi in 4 subjects = 80/100 × (100 × 4)
= 80/100 x 400
= 320
Therefore, the total marks scored by Ravi in all 5 subjects = 320 + 65 = 385
⇒ Total % scored by Ravi = (385/500 × 100) % = 77% =
0.77
Hence, the third option is correct.
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