Question

bananas are brought at the rate of rs.48 per dozen and sold at the rate of rs.50 per 10.find the gain or loss percent

Answer 1

C.P
= 48 per dozen
= 48/12
= 4 Rs per banana

S.P
= 50 per 10
= 50/10
= 5 Rs per banana

Gain percent
= (5-4)/4 × 100
= 1/4 × 100
= 25%

Answer 2

CP of 12 bananas = Rs 48
CP of 1 banana = 48/12 = Rs 4

SP of 10 bananas = Rs 50
SP of 1 banana = 50/10 = Rs 5

SP of 1 banana > CP of 1 banana

It is a loss
Loss = SP - CP = 5-4 = Rs 1

Loss % = loss/CP x 100%
= 1/4 x 100 = 25%