if the mean of 20 numbers is 18. if we add 2 to each number so what is the new mean?
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it will be increased by 40 amount
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sum of numbers= 18*20=360.
if 2 is added to each no. then sum becomes 360+40=400
new mean = 400/20
=20.
if 2 is added to each no. then sum becomes 360+40=400
new mean = 400/20
=20.
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