Quantity I: Ratio of present ages of A and B is 6:7 respectively while the ratio of present ages of C and D is 8:9. Ratio of the age of B after two years to age of C seven years ago is 6:5. Sum of the present ages of A, B, C and D is 120, then find average of the ages of A and D.
Quantity II: If the average of ‘q’ numbers is 20. If half of the numbers are decreased by 20 and half of the others are increased by 16, then what is the new average?
Let the age of A = 6x years Therefore, age of B = 7x years Age of C=8 years Therefore, age of D = 36years (7x+2)/(8y–7) = 6/5… Equation(1) Sum of ages =120 13x+17y=120….. Equation(2) Solving Equation(1) & Equation(2) x=4 y=4 A=24years, D=36years Average of A and D = (24+36)/2=30years (quantity 1) Quantity 2 : Sum of q numbers = 20q So new sum = 20q + (0.5q*16) – (0.5q*20) = 18q New average = 18q/q = 18 Ans. A. Q1>Q2
What are the main themes of Poshan Pakhwada 2024, as announced by the Ministry of Women and Child Development?
What is the title of the book launched by Sri Lanka’s former President Gotabaya Rajapaksa, defending his regime against a perceived conspiracy?
...Which type of sensor was used in the advanced water level monitoring system installed on the Brahmaputra Mail Express?
The Central University of Kerala developed a breakthrough sensor for detecting which substance?
Who authored the book titled 'Samayapuram - The Sacred Seat of Shakti,' recently released?
What was the percentage of yearly growth in UPI transactions recorded in August 2024?
Which entity partnered with the National Film Development Corporation in July 2024 to launch "The Voicebox," a training program for voice-over artists i...
Which bank became the first private sector bank to open a branch in Lakshadweep?
According to a recent SBI report, what is the primary reason for the expected inflation rate to remain around 5 percent for the fiscal year 2024-25 in I...
Which organization established NPCIBHIM Services Ltd as a whollyowned subsidiary?