The average age of a class of 39 students is 15 years.if the teacher age included.then average increases by 3 months. find the age of teacher
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a.t.qsum of age of all students of class. =avg. weight*no. of student
=39*15*12months
=7020 months
now including teacher age sum of all students & teacher's age =40*(15*12+3)
=183*40 months
=7320 months
age of teacher=7320-7020=300 months
age=300/12=25 years
=39*15*12months
=7020 months
now including teacher age sum of all students & teacher's age =40*(15*12+3)
=183*40 months
=7320 months
age of teacher=7320-7020=300 months
age=300/12=25 years
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