Probability Practice Test 1

Question : 40 of 40

Marks: +1, -0

A box contains 6 blue and 8 black pens.A pen is selected at random without lookingfrom the box with replacement. Now again apen is drawn from the box. What is theprobability that the first pen is black and thesecond is blue?

$12/49$
$5/14$
$0.7$
$7/12$
None of the above

Validate

Solution:

Probability of getting black pens

= 8/14=4/7

Probability of getting blue pens

=6/14=3/7

Required probability

=4/7×3/7=12/49

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