Question
The average number of novels on historical, thriller and
fantasy in a library is 195, and the average number of novels on historical and fantasy is 150. If the number novels on fantasy is 20% less than the number of novels on thriller, then what is the number of novels on historical in the library?Solution
Let the number of novels on historical, thriller and fantasy be x, y and z respectively. Given, (x + y + z)/3 = 195 => x + y + z = 585 ….. (1) And, (x + z)/2 = 150 => x + z = 300 ….. (2) From equation 1 and 2 Number of novels on thriller = y = 285 Number of novels on fantasy = 0.8 × 285 = 228 Therefore, number of novels on historical = 585 – (285 + 228) = 72
A word is represented by only one set of numbers as given in any one of the alternatives. These sets of numbers given in the alternatives are represent...
In the following question, a word is represented by only one set of numbers as given in anyone of the alternatives. The sets of numbers given in the alt...
A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented ...
The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represente...
A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented ...
A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented ...
Relevant for Exams:
