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Option 1 : 5 : 6
⇒From the Graph,
⇒ Number of total student in 2017 - 2018 = 25 + 40 + 53 + 32 = 150
⇒ Number of total student in 2018 - 2019= 30 + 48 + 64 + 38 = 180
⇒ Required Ratio = 150 : 180 = 5 : 6
∴ the ratio of the total number of students appeared in examination in 2017 - 18 and 2018 - 19 is 5 : 6
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