Question

there are 25 students in a class . The average age of 10 students is 14.1 years.The average age of another 12 students is 9.5 years.The average age of the remaining students is 13.5 years.when a new boy is admitted, the average age of the class is reduced by 0.1 years.find the age of the new comer.​

Answer 1

Answer:

Step-by-step explanation:

Total Age of Class = 14.1 * 10 + 9.5 * 12 + 13.5 * 3 = 295.5 years

Thus, average age of class = 295.5 / 25 = 11.82 years

After new comer,

(295.5 + x) / 26 = 11.82 - 0.1

295.5 + x = 26 * 11.72

x = 304.72 - 295.5 = 9.22 years

Age of new comer is 9.22 years

Answer 2

Answer:

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