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In a college exam Ishani scored 80 marks out of 150 in Economics and 95 marks out of 120 in Statistics. Find the minimum marks she should score in Accountancy out of 100 to score 70% marks in 3 subjects.
1. 87
2. 86
3. 88
4. 84 
5. 85

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Correct Answer - Option 4 : 84 

Given:

Ishani’s scores in Economics = 80 out of 150

Ishani’s scores in Statistics = 95 out of 120

Total percentage in 3 subjects = 70%

Calculation:

Total maximum marks = 100 + 120 + 150

⇒ 370

Total marks in History and English = 95 + 80 

⇒ 175

Total marks required by her to get 70% = 370 × 70%

⇒ 370 × (70/100)

⇒ 37 × 7

⇒ 259

∴ she needs = 259 – 175

⇒ 84 marks

∴ The minimum marks she should score in Accountancy out of 100 to score 70% marks in 3 subjects is 84 marks.

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