 <translate> Total age of students is 14X10 = 140 Years
Total age inclusive of teacher = 15X (10+1) = 165
So, Teacher's age is 165-140 = 25 Yrs
There is a shortcut for these type of problems
Teacher's age is 10+(15X1) = 25 Years So the answer is (E). <yor> Apapọ ọjọ ori awọn ọmọ ile-iwe jẹ 14X10 = 140 Ọdun Apapọ ọjọ ori pẹlu ti olukọ = 15X (10+1) = 165 Nítorí náà, ọjọ́ orí Olùkọ́ ni 165-140 = 25 Yrs Ọ̀nà àbáyọ wà fún irú àwọn ìṣòro yìí Ọjọ́ orí olùkọ́ jẹ́ 10+(15X1) = 25 Ọdún Nítorí náà ìdáhùn náà ni (E). 