A. 26
B. 28
C. 30
D. 32
Explanation:
Let A = Set of students who fail in English
B = Set of students who fair in mathematics
Then , n(A) = 50, n(B) = 30 and n(A∩ B) = 12.
n(AUB) = n(A) + n(B)- n(A∩B) = (50 + 30 -12) = 68
Number of students who fail in one or both the students = 68
Number of those who pass in both = (100 – 68) = 32
Related Mcqs:
- A student has to opt for 2 subjects out of 5 subjects for a course. Namely commerce, economics, statistics, mathematics 1 and Mathematics 2, Mathematics 2 can be offered only if mathematics 1 has also opted. The number of different combinations of two subjects which can be opted is_________?
A. 5
B. 6
C. 7
D. 18 - In an examination 40% failed in Urdu, 45% failed in English. If 25% students failed in both the subjects. Then the percentage of failed students is________?
A. 15%
B. 65%
C. 60%
D. 70% - In an examination, 47% failed in English and 54% failed in Mathematics. Find the pass percentage in both the subjects if 31% failed in both the subjects?
A. 70%
B. 37%
C. 53%
D. 30% - In a class of 140 students, 60% of them passed. By what percent is the number of students who passed more than the number of failed students?
A. 80%
B. 20%
C. 40%
D. 50%
E. None of these - In an examination 38% of students fail in English and 61% pass in Urdu and 23% fail in both. Find the actual failure percentage?
A. 46%
B. 61%
C. 54%
D. 70% - In an examination, every candidate took physics or mathematics or both 65.8% took physics and 59.2% took mathematics the total number of candidates was 2000. How many candidates took both physics and mathematics?
A. 750
B. 500
C. 250
D. 125 - The average marks in mathematics scored by the students of a school at the public examination were 39. If four of these students who actually scored 5, 12, 15 and 19 marks at the examination had not been sent up, the average marks for the school would have been 44. Find the number of students sent up for examination from the school?
A. 20
B. 25
C. 30
D. 32 - A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If the average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what are the marks in Physics?
A. 60
B. 64
C. 72
D. 80 - Sarfaraz obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?
A. 65
B. 69
C. 72
D. None of these - The total marks obtained by a student in Mathematics and Physics is 60 and his score in Chemistry is 20 marks more than that in Physics. Find the average marks scored in Mathematics and Chemistry together.
A. 40
B. 30
C. 25
D. Data inadequate
