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Mathematics, 06.01.2021 16:10 offensiveneedle

The average age of staff in the maths department is 40. There are 7 members of staff (Jill, Nicky, Wendy, Cathy, Cerian, Alan and Andy).

The average age of Jill, Nicky and Wendy is 41.

The average age of Andy, Alan and Cathy is 43.

How old is Cerian?

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