The average age of 40 students is 15 years. When the age of 1 teacher is added the average age becomes 16. What is the age of teacher?
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Total sum of age of 40 students = 15×40 =600.
let age of teacher would be x.
Total count becomes (40students+ 1 teacher) = 41.
so, (600+x)/41 = 16,
600+x=656,
so, x=56.
Age of teacher would be 56.
let age of teacher would be x.
Total count becomes (40students+ 1 teacher) = 41.
so, (600+x)/41 = 16,
600+x=656,
so, x=56.
Age of teacher would be 56.
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