NIFT UG 2015 Question Paper with solutions

Question : 58 of 150

Marks: +1, -0

On an average 8 articles out of 280 produced by a certain machine are defective. What is the probability that an article chosen at random is not defective ?

$31/34$
$21/23$
$1/35$
$34/35$

Validate

Solution:

Number of non-defective article out of 280 article

=280–8=272

Required probability

=272/280=24/5

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