Question
PSLE
The graph shows the number of massage chairs sold from July to October. The number of massage chairs sold in October is equal to the average number of massage chairs sold from July to September. Find the number of massage chairs sold in October.

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PSLE
The graph shows the number of massage chairs sold from July to October. The number of massage chairs sold in October is equal to the average number of massage chairs sold from July to September. Find the number of massage chairs sold in October.