2002 AMC 8 Problem 9

Attempt Problem 9 of the 2002 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2002 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

9.

His South American stamps issued before the ‘7070s cost him

$0.40\$0.40

$1.06\$1.06

$1.80\$1.80

$2.38\$2.38

$2.64\$2.64

Answer: B
Concepts:data and graph interpretationmoney
Difficulty rating: 1010
Solution:

Brazil and Peru are the South American countries.

Brazil has 4+7=114+7=11 stamps before the ‘7070s, costing 116=6611\cdot6=66 cents. Peru has 6+4=106+4=10 such stamps, costing 104=4010\cdot4=40 cents.

The total cost is 66+40=10666+40=106 cents, or $1.06\$1.06.

Thus, B is the correct answer.

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