winnie45
02.12.2020 •
Mathematics
the mean of 30 numbers is 150.it was detected on rechecking that one value of 165 was wrongly copied as 135.find the correct mean
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Ответ:
151
Step-by-step explanation:
m=150cm
n=30
new mean =(m*n+165-135)/n
=(150*30+165-135)/30
=(4500+30)/30
=4530/30
=453/3
=151
therefore
correct mean =151
Hope this helps :D
Ответ:
880 x 700
= 616000
=6.16 x 10^5