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Option 1 : 86.66%
From the Graph
Total Number of student of class 6 = 42 + 10 + 8 = 60
Number of student who pass of class 6 = 42 + 10 = 52
⇒ Pass percentage of class 6 = (52/60) × 100 = 86.66%
∴ the pass percentage of class 6 is 86.66%
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