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thr average age of twenty students is 12 years.If the teacher's age is included,the average increases by one.what is the age of the teacher? |
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Answer» Step-by-step explanation: SUM of AGES of 20 students=20×12=240 now including teacher total people=21 according to given CONDITION, NEW average=13 so sum of ages of total people=21×13=273 age of teacher=273-240=33 |
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