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The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rose by 1 year. what is average age of the newly joined students?

The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rose by 1 year. what is average age of the newly joined students? Correct Answer 18

Let the sum of 5 new student’s age is x Then according to question, (150 + x)/15 = 16 = )150 + x = 240 = x = 90 Average of their ages = sum/number = )90/5 = 18

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