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  • The average age of 40 students of a class is 15 years. When 10 new students are admitted, the avera

The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2 years. The average age of new students is:

  • Option 1)

    15 years

  • Option 2)

    16 years

  • Option 3)

    16.2 years

  • Option 4)

    16.4 years

  • Option 5)

    15.2 years

Answers (1)

best_answer

Avg. Age = 15years
Sum of ages= 40*15= 600 years
when 10 students are added, new avg= 15.2
sum= 50*15.2=760 years
Sum of ages of 10 students = 760-600=160
Avg. Of ages of 10 students = 160/10 = 16 years.

Posted by

rishi.raj

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