Question
Initially, the strength of science stream of class 12th
was 1,000. (x + 10)% students shifted from science to humanities and later, (x + 10)% of the remaining students in science took commerce. The remaining strength of the science stream is now 490. Find the value of x + 10?Solution
The number so students after the students shifted to other stream, 
90 – x = 70 x = 20 So, x + 10 = 30 Hence, option b) is the correct answer.
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