Track / Stage 4 / 60 of 340 #320 of 1964
Problem 320
AMC 12 late, AIME early Combinatorics Difficulty 4.7 Multiple choice
Which two weights need to be swapped to balance the scale? (The unit of all weights is grams)
Pick one
Next problem →
Official solution
D
Translate the text above into English, please retain the original text's line breaks and format, and output the translation result directly.
Source: NuminaMath-1.5,
licensed Apache-2.0.
Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.