Question
 In a school with 400 students, the average age of the
boys is 16 years and that of the girls is 12 years. If the average age of school is 14 years 9 months. Then find the number of boys in the school.Solution
Total number of students in school = 400 Let the average age of Boys be ‘x. Then the number of girls in school = 400-x According to the question, x × 16 + (400 - x) × 12 = 400 × 14+9/12 16x + 4800 - 12x = 400 × 59/4 4x + 4800 = 5900 4x = 1100 x = 275 Number of boys = 275
What is the difference between GNP and GDP called?
Which Peshwa signed the treaty of Bassein with the East India Company?
What was the profession of Prime Minister of Japan, Shinzo Abe before it?Â
After serving for 25 years in the organization, Ruchir Sharma has left it, name the organization?
Which film won in the ‘Best Film’ category in the 70th British Academy Film Awards (BAFTA) given away in February 2017?
Which of the following excavation sites is associated with "Sangam age"?
To commemorate which birth anniversary of Mahatma Gandhi, Gramodaya chamber of Commerce and Technology (GCOT) instituted the ‘Gramodaya Bandhu Mitra P...
Anorexia nervosa is an eating disorder in teenagers. Here body weight:
The element with atomic number 59 lies in which block of the Periodic Table?
India along with ______ ASEAN Member States (AMS) were represented by 200 participants, at the 4th edition of the annual ASEAN India Grassroots Innovati...
Relevant for Exams:
