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?
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 region of Earth's atmosphere is the coldest?
Which countries does the Somali Current flow past in the Western Indian Ocean?
Which one of the following longitudes determines the Indian standard time?
Which ocean is the smallest by surface area?
Consider the following statements:
1. Pangong Tso Lake is the world’s highest saltwater lake.
2. The larger part of the Pangong Tso Lake...
Which of the following is the largest desert in the world?
Which of the following is a part of the "Seven Wonders of the Ancient World"?
The Equator does NOT pass through which of the following countries?
The waves generated by an earthquake are called ________.
What is the primary source of energy in an ecosystem?
