# SOLUTION: marys avrage in 3 tests is 55.in 4 tests is 65.after 2 other tests her average mark is 55.find the average in the 2 other tests.

Algebra ->  Algebra  -> Average -> SOLUTION: marys avrage in 3 tests is 55.in 4 tests is 65.after 2 other tests her average mark is 55.find the average in the 2 other tests.      Log On

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 Question 616637: marys avrage in 3 tests is 55.in 4 tests is 65.after 2 other tests her average mark is 55.find the average in the 2 other tests.Answer by lwsshak3(6491)   (Show Source): You can put this solution on YOUR website!marys avrage in 3 tests is 55.in 4 tests is 65.after 2 other tests her average mark is 55.find the average in the 2 other tests. ** let x=average in the 2 other tests. test scores total=3*55+4*65+2x=425+2x number of tests=3+4+2=9 test scores total/number of tests=55 (425+2x)/9=55 (425+2x)=9*55=495 2x=495-425=70 x=70/2=35