Question
The average weight of 100 students in a class is 46 kg.
The average weights of boys and girls are 50 kg and 40 kg respectively. What is the difference between the number of boys and girls?Solution
Let the number of boys and girls be x and (100 - x) respectively. According to the question, Mean = {50x + 40(100 - x)}/100 ⇒ 46 = {50x + 40(100 - x)}/100 ⇒ 4600 = 50x + 4000 - 40x ⇒ 4600 - 4000 = 10x ⇒ x = 600/10 ⇒ x = 60 So, the number of boys is 60. Number of girls = 100 – x = 40 Required difference = 60 – 40 = 20
Who was conferred the Chevalier de l’Ordre des Arts et des Lettres for contributions to Malayalam publishing?
The term “FLOPs” is often heard in the news. It corresponds to:
Barbados is the newest republic recently formed, identify the capital of Barbados?
Which bank has launched its virtual branch, which will deliver a unique experience of banking to existing and new customers who can now explore the bank...
On which date has the United Nations proclaimed World Football Day?
When is World Sanskrit Day celebrated every year?
Which PSU won the first place in Category-I for the ‘Rajbhasha Gaurav Samman’ 2023-24 awarded by TOLIC (PSU) Visakhapatnam?
The _____________ Legislative Assembly becomes first paperless Assembly by implementing National e-Vidhan Application (NeVA) programme.
What key aspects are included in the expansion of the Digital India initiative as approved by the Union Cabinet?
Which of the following conventions does not have its genesis in the United Nations Conference on Environment and Development?
Relevant for Exams:
