Question

Ravish bought 100 article for Rs4000 . He sold 20 of them at a gain 5% .At what gain percent must he sell the remaining articles so as to gain 20%on the whole ?

Answer 1

According to the statement,
CP of 100 articles= 4000
P%= 20%
SP= 120% of 4000= 120*4000/100= 4800
CP of 20 articles= 800
P%=5%
SP= 105% of 800= 840
SP of 80 articles= 4800-840= 3960
CP of 80 pens= 3200
P= 3960-3200= 760
P%= P/CP*100= 760*100/3200= 23.75%
Gain percent= 23.75%
Hope it helps.

Answer 2

profit percent = 23.75 %