Assumed Mean Method

Have a question about Assumed Mean Method? Ask our experts

Ask Your Question

Keep it short & simple. Type complete word. Avoid abusive language.

New answer posted•a year ago

The mean of 10 numbers 7 × 8, 10 × 10, 13 × 12, 16 × 16, …. is__________.

4 Views|Posted a year ago

Answered by

a year ago

$t_{r} = (3 r + 4) (2 r + 6) = 6 r^{2} + 26 r + 24$

$∴ \sum_{r = 1}^{10} t_{r} = \frac{6 \times 10 \times 11 \times 21}{6} + \frac{26 \times 10 \times 11}{2} + 24 \times 10 = 10 \times 398$

$M e a n = \frac{10 \times 398}{10} = 398$

Upvote