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Option 3 : 69.23%

Calculation:

Total number of students who scored less than 60% marks = (10 + 30) = 40

Total number of students who scored 70% and above marks = (65 + 40 + 25) = 130

The percentage of number of students who scored less than 60% marks to the number of students who scored 70% and above =

⇒ (90/130 × 100)

⇒ (9000/130)

⇒ 69.23%

∴ The required percentage is 69.23%

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