A discount series of 15%, 20% and 25% is equal to the single

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A discount series of 15%, 20% and 25% is equal to the single discount of

1. 48%
2. 49%
3. 50%
4. 51%

Correct Option: B

Single equivalent discount for 15% and 20%

=		20 + 15 −	20 × 15		%
			100

= (35 – 3)% = 32%
Single equivalent discount for 32% and 25%

=		32 + 25 −	32 × 25		%
			100

= (57 – 8) = 49%