Question
PSLE
The graph shows the number of computers sold from August to December. The number of computers sold in September is equal to the average number of computers sold from September, October, November and December. Find the number of computers sold in August.

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PSLE
The graph shows the number of computers sold from August to December. The number of computers sold in September is equal to the average number of computers sold from September, October, November and December. Find the number of computers sold in August.