Exam Maths Puzzle Numerical Ability Percentage

Two vessels contain spirits of concentrations 50% and 75% respectively. If two litres from the first vessel and three litres from the second vessel are mixed, then what will be the ratio of spirit to water in the resultant solution?
Option
(a) 15 : 17
(b) 7 : 17
(c) 13 : 7
(d) 17 : 15

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Exam Other Question

A sum of money was deposited at a compound interest at a certain rate. If simple interest instead
of compound interest had been calculated, then the interest for the first two years would have
decrease by 20 and that for the first three years by 61. What was the sum that was deposited? On a perticular day, the ratio of the number of passengers travelled by first class and to that of by second class between two railway stations was 1 : 50, whereas the ratio of fare of first class to that of second class between the same stations was 3 : 1. The amount of 1,325 was collected from the passengers travelled between the two stations, what was the amount collected from the passengers travelled by second class?
Option
(a) 850
(b) 750
(c) 1,000
(d) 1,250