Question

Set theory

Answer 1

\(70\%\) of the employees in a multinational corporation have VCD players,
\(75\) percent have microwave ovens, \(80\) percent have ACs and \(85\)
percent have washing machines. At least what percentage of employees
has all four gadgets?

\(\large \color{black}{\begin{align}
& a.)\ 15 \hspace{.33em}\\~\\
& b.)\ 5 \hspace{.33em}\\~\\
& c.)\ 10 \hspace{.33em}\\~\\
& d.)\ \text{cannot be dettermind} \hspace{.33em}\\~\\
\end{align}}\)

Answer 2

can you detirmine that with the info given?

Answer 3

no

Answer 4

then there is your answer :)

Answer 5

yup :)

Answer 6

it just gave you a bunch of numbers to throw you off

Answer 7

The answer given in bookk is \(\large 10\)

Answer 8

#YourBookIsWrongBecauseYouDontHaveEnoughInfo

Answer 9

Draw a Venn Diagram

Answer 10

lol it is difficult to draw a venn diagram for sets more than 3.

Answer 11

hmmmm...

Answer 12

A long time I am not in touch but I think I agree with @RhondaSommer

Answer 13

But she didn't gave any concrete soln for \(\text{"cannot be determind"}\)

Answer 14

Read the second solution. It is well explained.
http://gmatclub.com/forum/70-of-the-employees-in-a-multinational-corporation-have-vcd-players-208187.html

Answer 15

we could've had
Set a vcd players
set b ovens
set c acs
set d washing machines. but the venn diagram.. aiyahhh all the crazy intersections everywhere

Answer 16

but yeah 4 set diagrams are kind of ugly but the smallest intersection is there.

Answer 17

I have read that the above diagram of 4 sets in invalid.