A single discount equivalent to three successive discounts
of 20%, 25% and 10% is
a) 55% b) 50% c)48% d)46%

plz specify the method... thanks

Answers were Sorted based on User's Feedback

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

Ans of this Question is (d) 46%

 Is This Answer Correct ? 280 Yes 48 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

Intitally take 100 , 20% of 100 gives 80
25% of 80 gives 60
10% of 60 gives 54.

therefore 100 -54=46.

 Is This Answer Correct ? 242 Yes 33 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

net discount=a+b-(ab/100)
20 and 25 net discount is 20+25-(25*20/100)=40
similarly 40 and 10 is 40+10-(40*10/100)=46%

 Is This Answer Correct ? 150 Yes 19 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

100-20=80
100-25=75
100-90=90

now assume that the discount is given out of 100

so 80*75*90/100*100*100=0.54
so the one equivalent discount will be 1-0.54=0.46x100=46%

 Is This Answer Correct ? 70 Yes 16 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

let the value of the product be =x
after 20%discount the value becomes=x-(.2x)=.8x
now 25%discount on this value is given by=(.8x)(1-.25)
another 10%discount gives the cost as =(.8x)(1-.25)(1-.10) so the final cost is .54x
hence discount =1-.54=.46
that is 46% discount

 Is This Answer Correct ? 51 Yes 13 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

formula for successive discount
(a+b)-(ab/100)

for 20% and 25% (20+25)-(20*25/100)=45-5=40%
similarly for 40% 10% (40+10)-(40*10/100)=50-4=46%

Hence Ans is D) 46%

 Is This Answer Correct ? 34 Yes 6 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

100*(80/100)*(75/100)*(90/100)=54

so discount is 54 remaining is 46

 Is This Answer Correct ? 34 Yes 8 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

c-a+b-(a*b/100)
where c is the net discount.
firstly put 20 n 25 as a and b respectively in the above formula...u'l b getin net discount i.e. c=40
then put 40 and 10 as a and b in the same formula..

 Is This Answer Correct ? 21 Yes 5 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

a+b+c-(ab+bc+ca)/100+abc/(100)^2

 Is This Answer Correct ? 17 Yes 6 No

A single discount equivalent to three successive discounts of 20%, 25% and 10% is a) 55% b) 50% ..

hi Mishra,
is there any proper method for finding this? can u explain it without assuming the initial value as 100 or some thing? i expect some formula to calculate it..

 Is This Answer Correct ? 21 Yes 15 No

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