alleryજો ખાંડના ભાવમાં 25%નો વધારો થાય, તો ખર્ચને યથાવત રાખવા માટે વપરાશમાં કેટલા ટકાનો ઘટાડો થવો જોઈએ?
A15%
B20%
C25%
D30%
Answer & Solution
Correct answer: B. 20%
આવશ્યક પતન = r/(100+r) x 100 = 25/125 x 100 = 20%.
**ચેક:** નવો ખર્ચ = 1.25 x 0.80 = 1.0, યથાવત.
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