or
or
In a office, 72% people liked Tea and 44% people liked Coffee. If each of them liked either Coffee or Tea and 40 liked both, what is the number of employee?
(72p/100)+(44p/100)-40=p
(72p/100)+(44p/100)-p=40
(72p+44p-100p)/100=40
16p=40*100
p= 4000/16
p=250
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