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

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