Question
PSLE
The graph shows the number of projectors sold from January to May. The number of projectors sold in February is equal to the average number of projectors sold from February, March, April and May. Find the number of projectors sold in January.

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PSLE
The graph shows the number of projectors sold from January to May. The number of projectors sold in February is equal to the average number of projectors sold from February, March, April and May. Find the number of projectors sold in January.