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A toy manufactured by Sunni Gadgets Ltd. has two components

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A toy manufactured by Sunni Gadgets Ltd. has two components [#permalink] New post 07 Mar 2004, 12:43
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A toy manufactured by Sunni Gadgets Ltd. has two components in it. 11 out of 100 of the first component are likely to be defective, while 4 out of 100 of the second component are likely to be defective. What is the probability that a toy that rolls out of the factory is defective?

0.85
0.0044
0.23
0.13
None of these
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 [#permalink] New post 07 Mar 2004, 12:51
P of first component not deffective = 88/100 = 22/25
P of second component not defective = 96/100 = 24/25
P of not defective = 22/25 * 24 /25

P that toy is defective = 1 - 22/25 * 24/25 = 0.15

I guess E is the answer.
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 [#permalink] New post 07 Mar 2004, 12:58
Anand,
.15 is in fact the correct answer; however, their are computational errors in you reasoning.
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Pls include reasoning along with all answer posts.
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 [#permalink] New post 07 Mar 2004, 13:21
hi,

I realized that my computation has mistakes. it should be 89/100 instead of 88/100

Bye the way what is meant by Este examen me conduce jodiendo loco
  [#permalink] 07 Mar 2004, 13:21
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