how to write a expression from a proportion

The test had 2 parts. she answered 80% correct on part A. and 70% on part B. there are 30 questions on part A and 40 questions on part b. how many questions did she answer correctly in both parts of the test?
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?????????????? "korrektiallly" ???????????? . . . a anser be RITE or RONG . . . . . part a...80% av 30 quesshuns=24 rite . . . part b... 70% av 40 quesshuns=28 rite . .. sum=52 rite outa 70 . . . 52/70=0.74285714287142.... or bout 74% rite
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