Question

A shopkeeper buys 100 pens for 200 and sells 20 of them at a gain of 10%. At what gain por cent must he sell the remainder so as to gain 20'in all ​

Answer 1

Answer:

120% gain

Step-by-step explanation:

cost of one pen =₹2

₹2×11/10=₹2.2

80×x%=220-44=176

x=2.2

gain %=120%

Answer 2

Step by step explanation:
100 pens=200 therefore
C.P OF 20 pens = 40 ,
S.P OF 20pens =40*110/100=44
Total s.p= 200*120/100=240
S.p of 80 pens = 196
C.p of 80 pens = 160
Profit = 36
Therefore gain %= 36/196*100=900/49%