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Discussion

eLitmus Preparation
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The average age of a group of 10 students is 15 years. When five more students join the group, the average age rises by one year. The average age (in years) of the additional 5 students is

 
18
14
16
15
19

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Pratikshya

18

Krati Agrawal

18

Praveena Nagineni

(150 5x)=15(15 1) (150 5x)=240 5x=240-150 5x=90 x=(90/5) x=18