Question
The number of students in class IX and class X is 42 and
45, respectively. The ratio of the number of boys to girls in classes is IX and X is 9: 5 and 8: 7, respectively. What is the difference between the total number of boys and the total number of girls in both the classes taken together?Solution
Number of boys in class IX = 42 Γ (9/14) = 27 Number of girls in class IX = 42 Γ (5/14) = 15 Again, Number of boys in class X = 45 Γ (8/15) = 24 Number of girls in class X = 45 Γ (7/15) = 21 Total of boys in two classes = 27 + 24 = 51 Total of girls in two classes = 15 + 21 = 36 Difference = 51 - 36 = 15 β΄ The difference between the total number of boys and the total number of girls in both the classes taken together is 15.
Consider the following pairs:

Which of the above pairs...
In which year was the Third Battle of Panipat fought?Β Β
With reference to Raja Ram Mohan Roy, consider the following statements:
1. He established Atmiya Sabha as a part of Brahmo Samaj.
2. B...
The Indian National Congress was founded in which year?
The Danes formed an East India company and established their headquarters at?Β
Who wrote the book 'India Wins Freedom' ?
Which of the following is/are the achievements of the Congress ministries in the provinces before resignation?
1. Political prisoners were releas...
In which of the following battles were the French completely defeated by the English?
Which regiment did Mangal Pandey, a key figure in sparking the Indian Rebellion of 1857, serve in?
Consider the following pairs with reference to the European powers and the first factories established by them: