A class of 30 students has an average age of 15 years. If 10 more students, with an average age of 12 years, join the class, what is the new average age of the class?
A class of 30 students has an average age of 15 years.…
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A class of 30 students has an average age of 15 years. If 10 more students, with an average age of 12 years, join the class, what is the new average age of the class?
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