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- The average age of 50 persons of a group is 60 years. If 5 persons are excluded, then the average becomes 62 years. Find the average age of excluded persons.
- The average age of a group of 50 persons is 60 years. When five persons are included to it, the average becomes 62 years. What is the average age of new persons?
- If a person whose average weight is $40 \mathrm{~kg}$ is replaced from a group of 30 persons and a new person comes, then the average weight is increased by $1 \mathrm{~kg}$. Find the weight of new person.
- The average age of 25 persons is 30 years. 5 persons are included, then the average age becomes 32 years. Find the average age of new persons.
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- The average age of 8 persons in a committee is increased by 2 years. When two men aged 35 years and 45 years are substituted by two women. Find the average age of these two women.
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