Question : In an examination, the average marks obtained by John in English, Math, Hindi, and Drawing were 50. His average marks in Math, Science, Social Studies, and Craft were 70. If the average marks in all seven subjects are 58, his score in math is ________.
Option 1: 50
Option 2: 52
Option 3: 60
Option 4: 74
Correct Answer: 74
Solution : The total marks obtained by John in English, Math, Hindi, and Drawing = (50 × 4) = 200 and total marks obtained by John in Math, Science, Social Studies, and Craft = (70 × 4) = 280 Also, the total marks obtained by John in all seven subjects = (58 × 7) = 406 So marks obtained in math are = (200 + 280) – 406 = 74 Hence, the correct answer is 74.
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