Mathematics · Averages and Statistics
Match the mathematical problems in Column-I with their correct answers in Column-II: Column-IColumn-II(a) If the mean of a, b, c is 5 and ab + bc + ca = 0, then the mean of a2, b2 and c2 is:(I) 75(b) The average of 7 consecutive numbers is 20. The largest of these numbers is:(II) 36.5(c) The average age of 36 students in a group is 14 years. When the teacher's age is included, the average increases by 1. The teacher's age is:(III) 23(d) The mean of 50 observations was 36. It was later found that the number 48 was wrongly recorded as 23. The correct mean is:(IV) 51 Choose the correct match from the options below:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1None of these
- 2a-III, b-I, c-IV, d-II
- 3a-I, b-III, c-I, d-II✓
- 4a-I, b-II, c-III, d-IV
Correct answer
a-I, b-III, c-I, d-II
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