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CA Foundation · Quantitative Aptitude · Statistical Description of Data

Data on 40 shops are classified by region (North, South) and by size (Small, Large). There are 22 shops in North, 18 in South, and 15 Large shops overall. If 9 Large shops are in North, how many Small shops are in South?

There are 12 Small shops in South. Large shops in South are 15 − 9 = 6, so Small shops in South are 18 − 6 = 12. This agrees with the total of 25 Small shops, since North has 13 and South 12.

  1. A12Correct
  2. B6
  3. C9
  4. D13

Explanation

Large in South = 15 − 9 = 6. Small in South = South total − Large in South = 18 − 6 = 12. Check: Small in North = 22 − 9 = 13, and 13 + 12 = 25 = 40 − 15. Option 6 is the Large shops in South, and 13 is Small in North.

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