SER= 1-{(1-0.8)(1-0.85)}
=1- {(0.8)(0.85)
=1- {0.68}
= 0.32 or 32%

SRI RAJ

Oct 2nd, 2014

A. 30%

Aswathy

Nov 8th, 2014

-15-20+(300/100)=-32
i.e., 32% discount

adnanarsalan

Jan 11th, 2015

Formula d1+d2+ (d1xd2)/100 whereas there has been talking about discount therefore both 20% and 15% will be negative so ,
-15-20+(-15x-20/100)
or, -35+(300/100)
or, -35+3
or,-32
so 32% =-32
i.e., 32% discount

Rajesh kumar

Nov 17th, 2015

Ans. 32%

Digar karki

Dec 1st, 2015

Suppose Cost Price is Rs. 100 then 20%
Discount means Selling Price is Rs. 80 but
Again on this price there is a discount of 15%
Therefore the final selling price is 80-(80*15)/100=Rs.68
Therefore total discount = ((CP-SP)*100)/CP =32%

rajesh

Jun 22nd, 2016

Suppose CP=100
so that 100-20=80
again on 15% discount= 80*85/100=68
total discount is = 100-68=32%

MD. SHOWKAT AZIZ

Aug 15th, 2016

Formula:
(-r)+(-r)+(-r)(-r)/100= -32%
Ans= 32

Anonymous

Aug 19th, 2016

Soln. let X = 20% discount, Y = 15% discount, we have, (X+Y - XY/100)% = (20 + 15 - 20*15/100)%
= (35 - 300/100)%
={(3500 - 300)/100}%
=(3200/100)100
=32%

himadri

Sep 28th, 2016

formula:A+B+AB/100
here discount so
(-20)+(-15)+(-20)(-15)/100
= -35+3
= -32(32% discount)

kpmlatha

Apr 10th, 2017

B. 32%

Satyam Anand

May 18th, 2017

As we know that
X+Y - XY/100 = Total Discount
so
20 + 15 - 20×15/100
35-3=32%
32% = Total Discount

## Successive discounts of 20% and 15% are equal to a single discount of A. 30% B. 32% C. 34% D. 35% E. 36

B

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