Last updated at April 16, 2024 by Teachoo
Example 5 Find the average of 4.2, 3.8 and 7.6.Average = (4.2 + 3.8 + 7.6)/3 = 𝟏/𝟑 × (4.2 + 3.8 +7.6) = 1/3 × (42/10×38/10×76/10) = 1/3 × ((42 + 38 + 76)/10) = 1/3 × ((76 + 42 + 38)/10) = 𝟏/𝟑 × 𝟏𝟓𝟔/𝟏𝟎 = 156/3 × 1/10 = 1/3 × 156/10 = 𝟏𝟓𝟔/𝟑 × 𝟏/𝟏𝟎 = 52 × 1/10 = 52/10 = 5.2 Average = 5.2