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

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