mean of 5 members is 18if ine number is added to group the new mean is 20 then find the newly added number
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When 2 is added to each no.,we get 360+(20×2) =400 Now,new mean value of 20 no.=400÷20 =20. ... If 3 is added to the first 10 numbers, then what is the new mean of the 20 numbers? ... The average of 3 of them is 5. ... Since 2 is added to each of the 20 numbers there will be an increase of 40 in the total.
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