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?
Raina makes a score of 110 runs in 22nd inning of his career and thus increases his average by 4. Find his average after 22nd inning.
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The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.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?
The average weight of 19 students was 50 kg. By the admission of a new student the average weight is reduced to 49.6 kg. What is the weight of the new student?
