Question
Nora scored 70, 89, 84 and 61 marks for her first four Science tests. She wishes to improve her average mark by 4. How many marks must she score for her next Science test?
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Nora scored 70, 89, 84 and 61 marks for her first four Science tests. She wishes to improve her average mark by 4. How many marks must she score for her next Science test?