1.

There are 8 teachers in a school. When a 35 year old teacherwas transferred and another teacher joined, the average agews increased by 2 years. How old is the new teacher?

Answer»

let n be the total age of all the teachersthen avg. age=n/8when 35 year old left another joined (let his age be x)then avg. age=(n-35+x)/8............ (1)also acc. to question avg. age=n/8 +2........... (2)equating both the eq.swe getx=51so if the age of teacher who joined is 51 years then avg. age will increase by 2


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