The updated averages are: (i) 22.5k (midpoint), (ii) 25k, (iii) 12.5k (midpoint), (iv) 10.45k (close to 10), (v) 20k and (vi) 15k (remains unchanged at point O).
Class 9 Maths How Quantities Combine Understanding Data Question Answer
Class 9 Maths Ganita Manjari Part 2 Chapter 10 Question And Answer
Calculating each weighted average: (i) [(1 × 15) + (1 × 30)]/2 = 22.5k (mark midway between 15 and 30). (ii) [15 + (2 × 30)]/3 = 25k. (iii) [(1 × 15) + (1 × 10)]/2 = 12.5k. (iv) [15 + (10 × 10)]/11 ≈ 10.45k (near 10k). (v) [15 + (0.5 × 30)]/1.5 = 20k. (vi) [15 + (0.5 × 15)]/1.5 = 15k (remains exactly at O).
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