Two successive price increases of 10% and 10% of an article are equivalent to a

Question

Two successive price increases of 10% and 10% of an article are equivalent to a single price increase of

Options:

A . 20%

B . 22%

C . 21%

D . 19%

Answer: Option C
Answer: (c)
Using Rule 7,
If a number is first increased by a% and then again increased by b%, then total increase per cent is $(a + b + {ab}/100)$%

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