Volga, a famous pastry parlour in Hamirpur, sells three varieties of pastry: Chocolate, Vanilla and Mix Fruit. Their demand in January was in the ratio $13:16:21$. In February the demand rose by 100%, 50% and $33\tfrac{1}{3}\%$ respectively. In March, demand for both Chocolate and Mix Fruit rose by 25%, while Vanilla's demand became equal to the mean of the three varieties. Find the percentage increase in Vanilla's demand from February to March.
Answer and solution
Correct answer: A
Solution
Jan: 13,16,21. Feb: 26,24,28. Mar: Choc $=32.5$, MixFruit $=35$, Van: use total and ratio. Apr projection follows same growth.