Answer / ss mishra

Ans of this Question is (d) 46%

Answer / aravind k

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


therefore 100 -54=46.

46 might be the answer.

Answer / parameshwar appi

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

Answer / isha trivedi

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%

Answer / uday

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

Answer / ranjit kumar

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%

Answer / ravi

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

so discount is 54 remaining is 46

Answer / kdscapricorn

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..

the answer shud be 46%

Answer / ajay

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

Answer / francis

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..

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