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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 = ${1/4}$.