Management Aptitude Test Dec 2012 Paper

Question : 90 of 200

Marks: +1, -0

Varun throws two unbiased dice together and gets a sum of 7. If his friend Tarun, then throws the same two dice, what the probability that the sum is less than 7?

$1/6$
$7/12$
$1/2$
$5/12$

Validate

Solution:

(d) Probability that Varun gets a sum of 7 = P(A) =

6/36=1/6

Probability that Tarun gets a sum less than 7 = P(B) =

15/36=5/12

Now, P

(B/A)

{P(A∩B)}/{P(A)}

{P(A)P(B)}/{P(A)}

(∵ A and B are independents)
= P(B) =

5/12

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