NIACL Model Paper 5 with solutions for free online practice

Question : 35 of 100

Marks: +1, -0

In a box there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it isneither red nor green?

Solution:

If the drawn ball is neither red nor green, then it must be blue, which can be picked in

^7C_1

= 7 ways. One ball can be picked from the total (8 + 7 + 6) in

^21C_1

= 21 wasy

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