Multiple choice

The ratio of chairs to tables in an office is 9 : 7. If there are 42 more chairs than tables, find the number of chairs in the office.

  1. $189$
  2. $215$
  3. $147$
  4. $200$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let chairs = 9k, tables = 7k. Difference: 9k - 7k = 42, so 2k = 42, k = 21. Chairs = 9k = 9 × 21 = 189. Option A is correct.