The mene of 75 number is 35 if each number is multiplied by 4 find the new mean
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Let 75 numbers are
a ,b ,c ,…………75 numbers
(a+b+c+…75 numbers )= let x
x/75=35
4a+4b+4c………..75 numbers
=4(a+b+c+………75 numbers)
=4×x
new mean =4x/75 =4(x/75)=4×35
=140 ans
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