In an examination, 35% students failed in English, 30% failed in Mathematics and 20% failed in both. If the total number of students passing in both subjects is 550, find the total number of students. MCQ with Answer and Explanation
In an examination, 35% students failed in English, 30% failed in Mathematics and 20% failed in both. If the total number of students passing in both subjects is 550, find the total number of students.
A. 1100
B. 1000
C. 800
D. 900
Answer: Option B
Solution (By JKSSB Mock Tests)
Failed in at least one = 35+30-20 = 45%. Passed in both = 55% = 550 → total = 550/0.55 = 1000.
A man's salary is increased by 10% in the first year, by 20% in the second year, and decreased by 10% in the third year. If his final salary is Rs. 35640, find his initial salary.
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