Let the number which when multiplied by 15 is increased by 280. Choose the correct choice from the following choices.
A) 14  B) 20  C) 26  D) 28  E) 30

Rationale: "solution let the number be x . then , 15 x - x = 280 ‹ = › 14 x = 280 x ‹ = › 20 . answer b"
Answer: B