Question

ANSWER PLZZZZ
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THE MEAN OF 100 ITEM WAS FOUND 30. IF AT THE TIME OF CALCULATION 2 ITEMS WERE COPIED AS 32 & 12 INSTEAD OF 23 & 11 .fIND THE CORRECT MEAN.

Answer 1

29.9 is the new mean
30 x 100= 3000
Add 34 (23+11)
Decrease 44 (32+11)
Comes 2990
So mean = 29.9

Answer 2

sum of 100 items=100×30=3000
difference=32-23=9
difference=12-11=1

total=1+9=10
3000-10=2990
correct mean =2990/100=29.90