1980 AHSME Problems/Problem 11

Problem

If the sum of the first $10$ terms and the sum of the first $100$ terms of a given arithmetic progression are $100$ and $10$ , respectively, then the sum of first $110$ terms is:

$\text{(A)} \ 90 \qquad \text{(B)} \ -90 \qquad \text{(C)} \ 110 \qquad \text{(D)} \ -110 \qquad \text{(E)} \ -100$

Solution

$\fbox{}$

1980 AHSME (Problems • Answer Key • Resources)
Preceded by Problem 10	Followed by Problem 12
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1980 AHSME Problems/Problem 11

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Solution

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