The average age of a group of 15 players is 23 years. If the age of the coach be included, then the average increases by 6 months. Find the age of the coach.
The average weight of a group of boys is 48 kg. If 8 boys of average weight 51 kg leave and 3 boys of average weight of 42 kg join the group, then the average weight of group decrease by 1 kg 50 gm. Find the initial number of boys in a group.
When a boy weighing 47 kg left a group, the average weight of the remaining 49 students increased by 300 g. What is the average weight of the remaining 49 students?
The average age of 16 employee in a working for an organization is decreased by 3 months, when an employee aged 17 years replaced by a new employee. Find the age of new employee.
The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.
Find how much younger is the new member?
Average score of a group of a athlete was 42 in certain event. When a new athlete join the group and scores equal to 250% of the average score of the group, then average of a group increases by 30%. How many athletes were there in a group before joining of a new athlete?
