Question
How many students not appeared in exam
Y? Study the following information carefully and answer the given questions: There are 1000 students in a college. Out of 1000 students some appeared in exams ‘X’, ‘Y’ and ‘Z’ while some not. Number of student not appeared in any exam is equal to number of students appeared in exam ‘Z’ only. Number of students appeared in exam ‘Y’ is 360. Ratio of number of students appeared in exam ‘X’ and ‘Y’ only to number of students appeared in exam ‘Y’ and ‘Z’ only is 2:3. Number of student appeared in exam ‘X’ and ‘Z’ both is half of number of students appeared in only exam ‘Z’. Number of students appeared in exam ‘X’ only is 50% more than number of students appeared in ‘Y’ only. Number of students appeared in all the three exam is 4% of the total number of students in the college. Number of students appeared in ‘Y’ exam only is same as number of students appeared in ‘Y’ and ‘Z’ only.Solution
Total students = 1000 Let, students appear in exam Z only = a Total students appeared in exam Y = 360 Ratio of number of students appeared in exam X and Y only to students appeared in exam Y and Z only = 2:3 Students appeared in exam X and Z both = a/2 Number of students appeared in all three exams = (4/100) × 1000 = 40 Number of students appeared in Y exam only = No. of students appeared in Y and Z only = 3x Number of students appeared in exam X and Y only = (2/3) × 3x = 2x Now, 2x + 3x + 3x + 40 = 360 ⇒ x = 40 And, 12.5x + a + a/2 + a = 1000 => 5a/2 = 500 ⇒ a = 200 Student not appeared in exam Y = 1000 – 360 = 640
The Reserve Bank of India (RBI) has prohibited _________ from lending under two products — Insta EMI and eCOM due to violations of certain provisi...
Which of the following pairs is correctly matched?
Match the following tombs with their distinctive features:
The National Highways Authority of India (NHAI) aims to develop around 10,000 km of Optic Fibre Cables (OFC) infrastructure by which fiscal year?
Which Indian company ranked highest on the Fortune Global 500 list for 2024, marking its 21st year as the top Indian company on the list?
Which of the following statements about the Indian social reformers of the 19th century is INCORRECT?
Arif Mohammed Khan appointed as Governor of Bihar in Dec, 2024. Whom did he succeed?Â
What is the SI unit of electric charge?Â
- The 'Lokrang' festival, dedicated to tribal and folk culture, is celebrated in which state?
- Who was appointed interim chairman of the World Economic Forum in April 2025?