Question
In a school with 400 students, the average of the age of
the boys is 16 years and that of the girls is 12 years. If the average age of the school is 14 years 9 months. Then find the number of girls in the school?Solution
Total number of students in school = 400 Let the number 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 girls = 400 - 275 = 125
In May 2023, Ministry of Culture and MyGov have launched a singing talent hunt by which name?Â
What rank did India acquire in the World Press Freedom Index 2023?
Which Hollywood actor will receive Honorary Palme d’Or Prize at Cannes Film Festival 2023?
India has signed an MoU with which country for industrial research and development cooperation in May 2023?
What is the name given to the cyclone that the India Meteorological Department predicts to hit India’s Eastern Coast?
India’s first Rafale lady pilot Shivangi Singh participating in Orion Military Exercise 2023 belongs to which state?
Tropical storm 'Cyclone Mocha' in the Bay of Bengal was named by which country?
What is the name of a recently created digital distribution platform by HDFC Bank of India?
Under India’s G20 Presidency, Science 20 Engagement Group meeting was conducted in which area?
Which country is ranked number 1 in ICC Men’s Test and T20 Team Rankings 2023?
Relevant for Exams:
