Question
In a test consisting of 300 questions, Pooja answered
40% of the first 180 questions correctly. What number of the other questions does she require to answer correctly to score a total of 80 per cent in the exam?Solution
Total number of question = 300 Total no. of question to be answered correctly for her to score in exam to be 80% = 300 ×80 / 100 = 240 Required number of question = 240 - 180 ×40 / 100 = 240 – 72 = 168
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