1.

The average of 100 items was found to be 30. If at the time of calculation, two terms were wrongly taken as 32 and 12 instead of 23 and 11, then the correct average is1). 29.82). 293). 29.94). 29.5

Answer»

the SUM of 100 numbers = 30 × 100 = 3000

As 23 and 11 was added as 32 and 12

Therefore, actual sum = 3000 – 32 – 12 + 23 + 11 = 2990

correct mean = 2990/100 = 29.90



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