ARITHMATIC MATHS CRASH COURSE FOR FREE AVERAGE (PART-3)

If the average weight of 6 students is 50 kg. If two student of average age of 51 kg added and other students of average age of 55 kg also added then the average weight of all students is a) 51.5 kg b) 61 kg c) 51.2kg d)52 kg

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The average marks of 100 students were found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct average corresponding to the correct score. a) 39 kg b) 41 kg c) 38.7 kg d)39.7 kg

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DO 29.74

The average of 18 observations is recorded as 124. Later it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82. Find the correct average of the 18 observations. a) 122 b) 123 c) 111(7/9) d)137(3/9)

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The mean of 20 items is 47. Later it is found that the item 62 is wrongly written as 26. Find the correct mean. a) 48.8 b)47.7 c) 49.9 d)46.6

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