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Mathematics, 26.04.2021 22:30 mitetwojr

A park in Hatfield has trees which were planted in the years: 1940 1940 1965 1968 1972 1980
1986
1986
1986
1990
1992
1994
Work out the mean age of the trees
(a) in 2009,
(b) in 2030.

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