Average
hardQ1
The average age of a group of persons going for a picnic is 16 years. 20 new persons with an average age of 15 years join the group, decreasing the average age by 1 year. How many persons were originally in the group?
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The average age of a group of persons going for a picnic is 16 years. 20 new persons with an average age of 15 years join the group, decreasing the average age by 1 year. How many persons were originally in the group?