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     EduGorilla 
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    In a class of 20 students, the average age of a student is 17 years and 2 months. If the teacher is also included, the average age of the class becomes 18 years. If the principal is also included in the class who is 5years elder than the teacher, then the average age of class will be

    Options :-

    1. 18 years
    2. 18years
    3. 18years
    4. 19 years
    5. 21 years
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