36.
When the price of an article was reduce by 20%, its sale increased by 80%. What was the net effect on the sale ?

37.
In an examination, 34% failed in Mathematics and 42% failed in English. If 20% failed in both the subjects, the percentage of students who passed in both subjects was :

38.
In an election there were only two candidates. One of the candidate secured 40% of votes and is defeated by the other candidate by 298 votes. The total number of votes polled is :

39.
In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as get a mixture of 45% alcohol strength ?

40.
When 60% of a number is subtracted from another number, the second number reduces to its 52%, the ratio of the first number to the second number is :

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