Question
In a class of 50 students, the girls are 76%. The
average weight of boys is 62 kg and that of girls is 58 kg. What is the average weight (in kg) of whole class?Solution
Total students = 50 Numbers of girsl = 50 × (76/100) = 38 Number of boys = 50 – 38 = 12 For easy calculation, Ratio of girls to boys = 38 : 12 = 19 : 6 Let number of boys 6 and number of girls 19, then Average weight of 6 boys = 62 kg Sum of weight of 6 boys = 62 × 6 = 372 Average weight of 19 girls = 58 kg Sum of weight of 19 girls = 58 × 19 = 1102 Total weight of 19 girls and 6 boys = 372 + 1102 = 1474 Average weight of 25 students = 1474/25 = 58.96
Which rivers form the boundaries of the Kanchenjunga Mountain?
Consider the following statements with respect to the black soils:
1. It is found in parts of Tamil Nadu.
2. It is clayey, deep and imperm...
Which is the southernmost point of India?
Consider the following pairs of local wind and their associated features.
What is the highest peak in the Western Ghats of India?
Where is the ‘Gulf of Mannar Marine’ national park situated?
Consider the following statements:
1. In an antecedent drainage pattern, the river cuts through uplifted portions of land.
2. In a superim...
Which of the following regions are separated by Malda fault?
Phanigiri Buddhist site, recently seen in news, is located in which state?
Consider the following statements:
1. The distance between rails is one metre is known as Broad Gauge.
2. The distance between the ra...
Relevant for Exams:
