Krishna purchased a number of articles at rs. 10 for each and the same number for rs. 14 each. he mixed them together and sold them for rs. 13 each. then his gain or loss percent is:
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let the number of articles =x
therefore=x=10
x=14
therefore =x+x=10+14
2x=24
x=24÷2=12
therefore 12 article rs 24.
therefore=x=10
x=14
therefore =x+x=10+14
2x=24
x=24÷2=12
therefore 12 article rs 24.
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