क्रमश:10%,20% तथा 40% क्रमागत बट्टे किस एक अकेले बट्टे के बराबर है ?

Options

A. 0.5
B. 0.568
C. 0.6
D. 0.6228

Answer

B

Explanation

Let the price is = Rs. 100
After Discount Price
`=100xx(90)/(100)xx(80)/(100)xx(60)/(100)`
= Rs. 43.2
Difference = 100-43.2=56.8
So, 56.8% is a single discount percent of this series
Alternate
Successive Discounts of 10 % and 20 %
(10 % 20 % )
`=10+20-(10xx20)/(100)=28%`
then, successive Discounts of 28 % and 40 %
(28 % 40 % )
`=28+40-(28xx40)/(100)=56.8 %`