Question
In an examination the average marks of Rohit is 61. If
he got 19 more marks in science and 25 more marks in maths then his average would have been 65. Find the total number of subjects he studied?Solution
Let total number of subjects be x. Then, => (61x + 25 + 19)/x = 65 => 61x + 25 + 19 = 65x => 4x = 44 => x = 11
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