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 the number of girls in the school is.Solution
Let the average age of Boys be ‘x’ According to question, x × 16 + (400 - x) × 12 = 400 × 14(3/4) 16x + 4800 - 12x = 400 × 59/4 4x + 4800 = 5900 4x = 1100 x = 275 Number of girls = 400 - 275 = 125 Alternate Method: By Alligation, Boys            Girls 16              12        59/4 59/4 - 12     :   16 - (59/4) 11/4         :      5/4 11          :      5 So Number of girls = 5/(5+11) of 400 = 5/16 of 400 = 125 Â
What is the maximum subsidy amount available for Economically Weaker Sections (EWS) under the Credit Linked Subsidy Scheme (CLSS) component of PM Awas Y...
The Reserve Bank of India (RBI) imposed a monetary penalty on Poonawalla Fincorp Limited for which reason?
Who launched the AIIMS-SBI Smart Payment Card, which ensures hassle-free payments for treatment in AIIMS New Delhi?
When was the Pradhan Mantri Gram Sadak Yojana launched?
The PM Vishwakarma scheme offers a concessional interest rate of:
Recently, the Indian Navy has set up its first independent headquarters named ‘Nausena Bhawan’ at which place?
Which company recently launched the world's first CNG bike, ‘Freedom 125,’ which runs on petrol and also has the option of CNG (compressed natural g...
The ‘Sampoornata Abhiyan’ has been launched to achieve 100% saturation of 12 key social sector indicators across all Aspirational Districts and Bloc...
The Department of Economic Affairs amended which set of rules in 2024 to simplify cross-border share swaps and align them with Non-Resident Indian (NRI)...
Which state leads with the highest share of women in the unincorporated enterprises sector according to the Annual Survey of Unincorporated Sector 2022-23?