Question

8 pupils of average age of 12yrs leave a class of 30pupils of average age 14yrs. If 6 new pupils of average age 11yrs join the class. What is the average age of the pupils now in the class

5 years ago

(30*14 - 8*12 + 6*11 ) / (30-8+6) = 390/28 = 13.9

5 years ago

Related Questions

7 pupil of average age 12 leaves a class of 25 pupils of average age 14years if 6 new pupils of aver... 7 pupils of average age 12 years leave a class of 25 pupils of average age 14 years . If 6 new pupil... The average age of a class of 20 pupils is 11years.if each of the 5 oldest pupils in the class is 14...