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In a survey of 50 households in Lucknow on number of electrical appliances, the closed frequency polygon passes through (0,0), (10,5), (20,12), (30,18), (40,10), (50,5), (60,0).
What is the value of in the missing total: ?

Class 9Frequency PolygonsStatistics and Probability
  • A100
  • B55
  • C50
  • D45

Step-by-Step Solution

Adding the non-zero frequencies: 5 + 12 + 18 + 10 + 5 = 50, matching the 50 households surveyed.
Answer: C) 50

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