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mean of 11 observation =32
mean of 12 observation =30
sum of 11 observation =32*11=352
Sum of 12 observation =12*30=360
the value of bed observation =360-352=8
mean of 12 observation =30
sum of 11 observation =32*11=352
Sum of 12 observation =12*30=360
the value of bed observation =360-352=8
lucky7180:
sorrythis is wrong
Reallu
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