A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.
A. $$\frac{{6}}{{63}}$$
B. $$\frac{{2}}{{63}}$$
C. $$\frac{{125}}{{126}}$$
D. $$\frac{{1}}{{126}}$$
Answer: Option C
Solution(By Examveda Team)
Required probability$$\eqalign{ & = 1 - \frac{1}{{126}} \cr & = \frac{{125}}{{126}} \cr} $$
This Question Belongs to Arithmetic Ability >> Probability
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