Average of 10 numbers is 30. Later on it was observed that the numbers 15, 23 are wrongly written as
51 and 32. The correct average is
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Answer: 25.5
Step-by-step explanation: According to the question mean of 10 numbers is = 30
∴ Sum of 10 numbers is = 300
It was observed that numbers 15, 23 are wrongly taken as 51, 32
Difference = (51 + 32) - (15 + 23) = 83 - 38 = 45(more)
∴ Actual Sum of 10 numbers = 300 - 45 = 255
∴ Actual avg of 10 numbers 25510=25.5
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