Question

The mean of the first ten consecutive odd numbers is:

• A. \( 100 \)
• B. \( 10 \)
• C. \( 50 \)
• D. \( 20 \)

Hint:

For the first \( n \) odd numbers, the mean is always the middle term when \( n \) is odd, or the average of the two middle terms when \( n \) is even.

Answer 1

The Correct Option is B

The first ten odd numbers are:
\[ 1, 3, 5, 7, 9, 11, 13, 15, 17, 19. \] The mean formula is:
\[ \frac{\text{Sum of numbers}}{\text{Total numbers}}. \] Sum = \( 1 + 3 + 5 + \dots + 19 = 100 \),
so,
\[ \text{Mean} = \frac{100}{10} = 10. \]