Question

A man sells two wall watches at Rs. 99 each.
On one, he gains 10% and on the other, he
loses 10%. Find the C.P. of each wall watch.
What is the total gain or loss %?​

Answer 1

Answer:

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Answer 2

Answer:

$cp = ( \frac{100 }{100 + profit\%}) \times sp$

$cp = \frac{100}{110} \times 99$

$cp = \frac{10}{11} \times 99$

$cp = 10 \times 9$

$cp = rs90$

If he incurs loss on others so

$cp = \frac{100}{100 - loss\%} \times sp$

$cp = ( \frac{100}{90}) \times 99$

$cp = \frac{10}{9} \times 99$

$cp = 10 \times 11$

$cp = rs110$

Total cp= rs 200

Total sp = 198

When cp is greater than sp so loss is there

$loss\% = \frac{loss}{cp} \times 100$

$loss\% = \frac{2}{200} \times 100$

$loss\% = \frac{1}{100} \times 100$

$loss\% = 1\%$