1. In decreasing price of a motor bike by 10% number of bikes sold is increased by 10%. What is the change in overall sales?
(c) remains same
(d) may increase or may decrease
2. The radius of circle is increased by 20% its area is increased by:
(d) no change
3. A 30-ounce solution is 25% alcohol. If 60-ounces of water are added to it what percent of the new solution is alcohol?
4. 80% of the workers working in a company wear jeans. Of these 20% wear jeans that are black what percent of the workers wear jeans that are not black?
5. Two trains travel in the same direction at 50 and 32 km/h. A man in slower train observes that the faster train passes him in 15 seconds. The length of faster train is:
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