The frequency polygon shows the percentage scored by a student in different years. What was his average score from the years 2017 to 2020?

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DSSSB TGT Special Edu. Teacher General Section - 8 Aug 2021 Shift 2

Option 4 : 73 percent

**Given:**

The student scored percentage in 2017 = 67

The student scored percentage in 2018 = 71

The student scored percentage in 2019 = 61

The student scored percentage in 2020 = 93

**Concept:**

The average = (The sum of all items)/(The total number of items)

**Calculation:**

⇒ The average = (67 + 71 + 61 + 93)/4 = 292/4 = 73

**∴ The required result will be 73 percent.**