в среднем

listen to the pronunciation of в среднем
Русский Язык - Английский Язык
on average

Japanese women get married at 25 on average. - Японки выходят замуж в среднем в 25 лет.

She reads on average three or four books a week. - Она читает в среднем три-четыре книги в неделю.

in the mean of
in the mean
in average
on an average
with an average
by mean of