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     EduGorilla 
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    The average age of 78 students in a group is 25.5 years when the ages of some teachers were included in the group the new average became 29 years. Find the number of teacher included in the group if the average age of the teachers is 68 years.

    Options :-

    1. 8
    2. 7
    3. 9
    4. 6
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