A single discount equivalent to the successive discounts of 10%, 20% and 25% is = ?
A. 55%
B. 45%
C. 46%
D. 60%
Answer: Option C
Solution(By Examveda Team)
Let the price is = Rs. 100After discount price
$$\eqalign{ & {\text{ = 100}} \times \frac{{90}}{{100}} \times \frac{{80}}{{100}} \times \frac{{75}}{{100}} \cr & {\text{ = Rs}}{\text{. 54}} \cr & {\text{Difference = 100}} - 54 \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 46\% \cr} $$
So, 46% is a single discount of percent of this series.
Alternate :
Successive discount of 10% of 20%
$$\eqalign{ & = 10 + 20 - \frac{{10 \times 20}}{{100}} \cr & = 28\% \cr} $$
Then successive discount of 28% and 25%
$$\eqalign{ & = 28 + 25 - \frac{{28 \times 25}}{{100}} \cr & = 46\% \cr} $$
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Comments ( 1 )
Related Questions on True Discount
The true discount on Rs. 2562 due 4 months hence is Rs. 122. The rate percent is:
A. 12%
B. 13%
C. 15%
D. 14%
A. Rs. 9025.20
B. Rs. 9200
C. Rs. 9600
D. Rs. 9560
A. Rs. 12,000 in cash
B. Rs. 12,880 at credit
C. Both are equally good
D. Rs. 18.33
Initial CP=100
100 ->10% discount (10) is (100-10) =92 ,
next 90->20% discount (18) is (90-18) =72,
next 72 ->25% discount (18) is (72-18) =54
Initially taken 100 ,we need to subtract ,Then 100-54 =46%