In a bag, there are 6 brown, 4 blue and 10 orange pens. One pen is picked up randomly. What is the probability that it is neither brown nor blue?
Choose the correct choice from the following options:
A) 1/4
B) 1/5
C) 1/3
D) 1/2
E) 3/4
Explanation :   Neither brown nor blue means the pen drawn is orange.   Total number of outcomes = (6+4+10)= 
<gadget id="calculator">(6+4+10)</gadget>
<output>20</output>
20.   Number of Favourable outcomes= 10 = Number of orange pens.   Hence, Probability of the event = 10/20 = 1/2.   Answer : 1/2
<result>D</result>
In a bag, there are 6 brown, 4 blue and 10 orange pens. One pen is picked up randomly. What is the probability that it is neither brown nor blue?