12 people are either studying or working or doing both. If 9 peole are studing and 7 people are working, how many people are both studying and working at the same time?
the answer is 4
guys can you help me with this kind of question without usinfg the vann diagramm I saw a sort of table which is veryy userful with this kind of question.
thank you
cc![]()
the answer is 4
guys can you help me with this kind of question without usinfg the vann diagramm I saw a sort of table which is veryy userful with this kind of question.
thank you
cc