Question
In a group of 10 members, two individuals are 20 and 30
years old. Excluding these two, the average age of the remaining members increases by 1 year. Determine the average age of the entire group.Solution
ATQ, Average age of all members be 'z' years. Total age for all members is 10z. Age sum for the two excluded members is 20+30=50. Remaining members' total age 10z−50. New average for 8 members z+1. Equation: 10z−50=8(z+1) Solve: 10z−8z=50+8 ⇒2z=58 ⇒z=29
Complete the series by replacing ‘?’
CDG, GFM, KHS, OJY, ?
Following Rome's withdrawal, which city has been selected to host the 2027 World Athletics Championships?
Asansol, Howrah, Malda and Sealdah division come under which railway zone of India?
On keeping the coin inside the water, it appears to be standing, what is the reason?
Who was appointed as ICC's 'Global Ambassador' for T20 World Cup 2024?
The power of Eminent domain is the inherent power of the State over ________ property of citizens for public purposes.
______of the Directive Principles of State Policy deals with the promotion of international peace and security.
When do humans use more facial muscles?
Which organization launched 'Project Vaani' in collaboration with IIT Madras to collect voice data from across India to train AI models in local languages?
Which of the following vitamins includes cobalt as an essential component?
Relevant for Exams:
