Question
Ballu gets 5 marks for each correct answer and loses 3
marks for each wrong answer. If he attempts 40 sums and obtains 80 marks. The number of sum solved correctly isSolution
Let the ballu correct sums be x According to the question Correct marks – incorrect marks = Total marks 5 x – 3(40 - x) = 80 5x – 120 + 3x = 80 8x = 200 x = 25
? = (597.98 ÷ (6.97 2.01 – 3.1)) × 12.9
1153, 1206, ?, 1326, 1393, 1464
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