Math, asked by sailajpoudel1, 1 day ago

the mean of 20 item is 40 and the mean of another 30 item is 60 determine the mean of whole set of item

Answers

Answered by harikavi1234567

0

Answer:

100

Step-by-step explanation:

mean of 20 it is ots double that is 40

mean of 30 is it double 60

then 20+30=50

50x2=100

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