Question
PSLE
The graph shows the number of massage chairs sold from May to September. The number of massage chairs sold in June is equal to the average number of massage chairs sold from June, July, August and September. Find the number of massage chairs sold in May.

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PSLE
The graph shows the number of massage chairs sold from May to September. The number of massage chairs sold in June is equal to the average number of massage chairs sold from June, July, August and September. Find the number of massage chairs sold in May.