Question
The average age of 33 children and their teacher's age
are 25 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?Solution
Sum of the age of total children and teacher = 34 × 25 = 850 Sum of the age of children after excluding = 33 × 24 = 792 Teacher’s age = 850 – 792 = 58 years
? = (597.98 ÷ (6.97 2.01 – 3.1)) × 12.9
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