Discussion of Question with ID = 034 under Probability

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Question

A box contains 7 navy, 2 khaki and 3 orange balls. What is the probability of drawing a ball that is neither khaki nor navy?

A

${1/4}$.

B

$4/12$.

C

$2/66$.

D

$6/66$.

Soln.
Ans: a

Total number of marbles is 12. We have to basically find the probability of picking a orange ball, for which 3 chances are favorable. So probability = 3/12 = ${1/4}$.


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