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Question: There are 45 members in a group. 9 members have shoes but no hats. 18 members have shoes. How many members are there who have only hats? a)12 b) 19 c) 27 d) 18
Answer: d)18.
no. of members who have both hats and shoes=
18 - 9 = 9
no. of members who have hats = 45 - 18 = 27
no. of members who have hats only hats = 27 - 9 = 18. |
| June 06, 2008 11:02:12 |
#8 |
| rajani_vaddepalli15 |
Member Since: June 2008 Total Comments: 18 |
RE: There are 45 members in a group. 9 members have shoes but no hats. 18 members have shoes. How many members are there who have only hats? a)12 b) 19 c) 27 d) 18
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use the venn diagrams formulae : A union B = A + B - A intersection B
where AUB=45 (total)
no.of people who've shoes A=18
no.of people who've hats B=?
no.of people who've only shoes but not hats A-B = 9
no.of people who've shoes and hats A n B = 9
no.of people who've only hats but not shoes B-A = ?
apply formula
45=18+B-9
=> B=36
=> B-A= 36-9
=27
Ans:c |
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