SELECT avg(LifeExpectancy) FROM country WHERE Name NOT IN (SELECT T1.Name FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code  =  T2.CountryCode WHERE T2.Language  =  "English" AND T2.IsOfficial  =  "T")
Give the mean life expectancy of countries in which English is not the official language.
SELECT avg ( LifeExpectancy ) FROM country WHERE Name NOT IN ( SELECT T1.Name FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T2.Language = `` English '' AND T2.IsOfficial = `` T '' )
select avg ( lifeexpectancy ) from country where name not in ( select t1 . name from country as t1 join countrylanguage as t2 on t1 . code = t2 . countrycode where t2 . language = value and t2 . isofficial = value )
Give the mean life expectancy of countries in which English is not the official language .