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students are not studying

Expert replies
by sanju09 » Fri Jun 18, 2010 1:31 am
Of the 80 students in class, 25 are studying German, 15 French and 13 Spanish. 3 are studying German and French; 4 are studying French and Spanish; 2 are studying German and Spanish; and none is studying all 3 languages at the same time. How many students are not studying any of the three languages?
(A) 18
(B) 27
(C) 36
(D) 53
(E) 62
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
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Source: — Problem Solving |

by amising6 » Fri Jun 18, 2010 2:23 am
click on the image see the reult in venn diagram Image
Last edited by amising6 on Fri Jun 18, 2010 2:41 am, edited 1 time in total.
Ideation without execution is delusion
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by gmatmachoman » Fri Jun 18, 2010 2:31 am
Total = P(AUBUC) + Neither ---- (eq 1)

P (AUBUC) = P(A) +P(B) + P(C) - P(AnB)-P(BnC)-P(AnC) + P(AnBnC)

=25+15+13-3-4-2+0
=44

So put in equation 1

80 = 44 + Neither of any languages

Neither of any languages = 36

Pick C
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