Multiple choice general knowledge math & puzzles

The average of 7 numbers of a set is 33, if a new number ‘k’ is included in the set, then the average becomes 35. Col A: The value of k Col B: 47 which column is greater?

  1. col B

  2. Col A

  3. Both are equal

  4. Can't be determined

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sum of 7 numbers = 7 * 33 = 231. Sum of 8 numbers (including k) = 8 * 35 = 280. Therefore, k = 280 - 231 = 49. Since 49 (Col A) is greater than 47 (Col B), Column A is the correct answer.