24 छात्रों और एक अध्यापक की औसत आयु 18 वर्ष
है। अध्यापक की आयु हटा दिए जाने पर कक्षा की
औसत आयु 1 वर्ष कम हो जाती है। अध्यापक की आयु
(वर्ष में) क्या है?
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ha hahshsjwiwoejsisos
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Average age of 14 students+1 teacher = 15yrs.
Total age of 14 students +1 teacher = 15×15 =225 yrs.
Average age of 14 students = 15–1 = 14 yrs.
Total age of 14 students = 14×14 = 196 yrs.
Thus , age of teacher = 225 - 196 = 29 yrs.
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