Question

A shopkeeper buys quantities of two kinds of tea at the rate of rupees 200 per kg and rupees 100 for a kg .he mixes them together and sells the whole lot at the rate of rupees 180 per kg find his gain or loss per cent .
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Answer 1

Answer:

for you friend

CP=18×

10

7

+13×

10

3

=

10

126+39

=

10

165

= Rs 16.5

SP=Rs18.15

Gain =Rs 1.65

% gain=

1.65

1.65

×100=10%