• The change in a number which is first increased by 20% and then decreased by 20% is
(a) No change
(b) a decrease by 40%
(c) An increase by 40%
(d) An increase by 1%
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• The change in a number which is first increased by 20% and then decreased by 20% is
(a) No change
(b) a decrease by 40%
(c) An increase by 40%
(d) An increase by 1%
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Answer:
no change , Because Of Einstiens gain law