1.

The average age of 27 students of a class is 22. If the age of the teacher is also added to their ages, then the average increases by one. Find the age of the teacher -1). 422). 483). 504). 52

Answer»

Sum of ages of 27 STUDENTS of a class = 27× 22 = 594

The AVERAGE age of 27 students of a class and a teacher = 22 + 1 = 23

Sum ofages of 27 students of a class and a teacher = 23 × 28 = 644

Age of the teacher = 644 – 594 = 50

∴ Age of the teacher = 50


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