The average age of 24 boys and teacher is 15 years.when the teacher's age is exculded,the average decreases by 1.what is the age of the teacher
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Total number of all boys and a teacher is 25.
Since average age of all boys and a teacher is 15 years,
Total sum of ages of all = 25×15 = 375 years.
When a teacher's age is excluded,
Total number of all boys = 24
&
Since average age reduces by 1,
=> Average age now = 14
So total sum of ages of 24 students=24×14=336 years.
●So teacher's age = 375-336 = 39 years.
●●●Hope It Helps●●●
Total number of all boys and a teacher is 25.
Since average age of all boys and a teacher is 15 years,
Total sum of ages of all = 25×15 = 375 years.
When a teacher's age is excluded,
Total number of all boys = 24
&
Since average age reduces by 1,
=> Average age now = 14
So total sum of ages of 24 students=24×14=336 years.
●So teacher's age = 375-336 = 39 years.
●●●Hope It Helps●●●
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