In a bag, 60% are red balls, 30% are blue balls, and the rest are green balls. If 5% of red, 10% of blue, and 20% of green balls are defective, what percent of the total balls are defective?
A. 8.5%
B. 8%
C. 7%
D. 7.5%
Answer: Option B
Solution (By JKSSB Mock Tests)
Red=60, Blue=30, Green=10. Defective: Red 0.05×60=3, Blue 0.1×30=3, Green 0.2×10=2. Total defective=8%. So answer 8%.
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