there are 50 people in a class out of this number 1/10 speak French only and 4/5 of the remainder speak both French and English if the rest speak English only find number of students who speak both English and French , only English​
there are 50 people in a class out of this number 1/10 speak French only and 4/5 of the reminder speak both and English if the rest speak English only find number of students who speak both English and French only
