2019 · Q63
The average of 50 consecutive natural numbers is x. What will be the new average when the next four numbers are also included?
Elementary MathematicsStatistics
- Ax + 1
- Bx + 2
- Cx + 4
- Dx + (x/54)
Explanation
Fifty consecutive naturals with average x start at x−24.5. Adding the next four numbers gives 54 numbers starting at x−24.5, whose average is (x−24.5) + 26.5 = x + 2.