Question

A survey of 63 business people found that : 30 had desktop
computers ; 22 had laptop computers : 39 had fax machines : 15
had desktop computers and laptop computers; 18 had a desktop
computer and a fax machine : 14 had a laptop computer and a fax
machine : 12 had all the three.
(a) How many had only laptop computers ?
(b) How many had only fax machines ?
(c) How many had a fax machine and laptop but not a desktop
computer?
(d) How many had a fax machine or a laptop, but not a desktop
computer ?
(e) How many had none of the three items?​

Answer 1

Answer:

a)22

b)39

c)14

d)14

e)51

Answer 2

Answer:

(a) 22

(b) 39

(c) 14

(d) 39 and 14

(e) 1