Question
In a class of students, the ratio of boys to girls is
5:3. If 15 boys and 5 girls join the class, the ratio becomes 9: 5. What was the initial number of boys in the class?Solution
Let the number of boys be 5x and the number of girls be 3x. After joining, the boys = 5x + 15 and girls = 3x + 5. New ratio: (5x + 15) / (3x + 5) = 9/5 Cross-multiplying gives: 5(5x + 15) = 9(3x + 5) 25x + 75 = 27x + 45 2x = 30 x = 15 Initial number of boys = 5x = 75
______ has launched an online Radio, a platform to provide bite-sized content that offers both entertainment and livelihood enhancement tools. Â
Home Ministry has declared Delhi headquarters of Security Printing and Minting Corporation of India Ltd. (SPMCIL) as a ‘prohibited place’ un...
The Department of Animal Husbandry & Dairying, Ministry of Fisheries, Animal Husbandry, and Dairying (DAHD) has introduced the ‘Credit Guarantee Schem...
Who is at the top position in the list of World's Top 20 Most Admired Men which is released in a survey carried out by data analytics company YouGov?
Which Indian city witnessed the highest increase in average annual prices for high-end residential properties in the first quarter of 2023, according to...
What was the key achievement of the Chandrayaan-3 mission recognized with the 2024 John L. ‘Jack’ Swigert Jr. Award?
Who won Iran's presidential election with 53.7% of the votes?
Which state government has launched buses with air purifiers to reduce the pollution level?
Who became South Korea’s first civilian Defence Minister in over 60 years?
Which organization in India publishes the Wholesale Price Index (WPI)?
Relevant for Exams:
