Multiple choice

If the average of 5 consecutive odd numbers is m and the average of another 7 consecutive odd numbers is n, then what will be the average of all odd numbers?

  1. m + n

  2. m - n

  3. (7m + 5n)/12

  4. (5m + 7n)/12

  5. None of these

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

Sum of 5 consecutive odd numbers (avg. m) = 5m Sum of 7 consecutive odd numbers (avg. n) = 7n So, resultant avg. = (5m + 7n)/12