Percentage Mcqs

Q.  Out of 100 students, 50 failed in English and 30 in Mathematics. If 12 students fail in both English and Mathematics. Then the number of students who passed in both the subjects is__________?

a. 26
b. 28
c. 30
d. 32


ANSWER: See Answer
 
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
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MCQs:  Water tax is increased by 20% but its consumption is decreased by 20 %. Then, the increase or decrease in the expenditure of the money is:________?
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MCQs:  The price of cooking oil has increased by 25 %. The percentage of reduction that a farming should effect in the use of cooking oil so as not to increase the expenditure on this account is________?
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MCQs:  What will be 80 Percent of a number whose 200 percent is 90?
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MCQs:  In an election between two candidates, the candidate who gets 30 % of the votes polled is defeated by 15000 votes. The number of votes polled by the winning candidate is:________?
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MCQs:  In a college election, a candidate secured 62 % of the votes and is elected by a majority of 144 votes. The total number of votes polled is:________?
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MCQs:  A student who secures 20 % marks in an examination fails by 30 marks. Another student who secures 32 % marks gets 42 marks more than those required to pass. The percentage of marks required to pass is:________?
Category: Mathematics Quizzes,   Published by: T-Code Scripts
MCQs:  5 % income of a is equal to 15 % income of B and 10 % income of B is equal to 20 % income of C if the income of c is Rs. 200, then total income of A, B and C is :_________?
Category: Mathematics Quizzes,   Published by: T-Code Scripts
MCQs:  75 % of a number when added to 75 is equal to the number. The number is:_______?
Category: Mathematics Quizzes,   Published by: T-Code Scripts
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