Question

If the cost price of 10 greeting cards is equal to the selling price of 8 greeting cards ,find the gain or loss per cent

Answer 1

Let C.P of 10 greeting cards = 10x .

C. P of one greeting card = x.  

Now, C. P of 8 greeting cards, 8x .

Also S. P of 8 Greeting cards = 10x .

Now, Gain = 2x .

Gain % = 2x/8x * 100 = 25%

              OR

let cost price of 10 greeting card be x  

cost price of 1 greeting card is x/10  

selling price of 8 greeting card is x  

selling price of 1 greeting card is x/8  

take lcm  

x/8 & x/10  

5x/40 & 4x/40  

Profit= 5x/40 - 4x/40  

= x/40  

profit% =(x/40)/(4x/40) *100;  

= 25%

Answer 2

Given :-

Let the cost price of each card be x

Then, CP of 8 cards = 8x.

SP of 8 cards = CP of 10 cards = 10x.

Thus, CP = R 8x and SP = 10x.

→ Since ( SP ) > ( CP ), there is a gain.

→ Gain = ₹ ( 10x - 8x ) = 2x.

→ Gain% = ( Gain / CP × 100 ) %

= ( 2x / 8x × 100 )% = 25%

hope it works❤