Subject
Quantitative Aptitude
Topic
Number
A third of Karim’s marks in Mathematics exceeds a half of his marks in social studies by 30, if Karim got 240 marks in the two subjects together, how many marks did he get in Social Studies?
A third of Karim’s marks in Mathematics exceeds a half of his marks in social studies by 30, if Karim got 240 marks in the two subjects together, how many marks did he get in Social Studies?
ক)
88খ)
98গ)
132ঘ)
122Explanation
Let marks of Karim's Mathematics be = m And, marks of Karim's Social Studies be = s Then, A/Q, m/3 - s/2 = 30 (2m - 3s)/6 = 30 2m - 3s = 180 .................. (1) And, we know that, m+s = 240 ............... (2) multipying (2) with 2, we get, 2m + 2s = 480 ................. (3) From (3) - (1), we get, 2m + 2s - 2m +3s = 480 + 180 5s = 660 s = 660/5 = 132Related questions
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