Question

a man purchased some cards at 5 from 8 rupees and sold them at 8 for 12 rupees thus he loss 10 rupees how many cards did he purchase​

Answer 1

let total cards be x

c.p of 5 cards=8

c.p of 1 card=8/5 of x=8/5x

s.p of 8 cards=12

s.p of 1 card=12/8 of x=3/2x

loss=c.p-s.p

loss=(8/5-3/2)x

=1/10x

atq, 1/10x=10

x=10×10

x=100