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In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes?
In a certain city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city have neither black hair nor black eyes?
__________ of rubber decreases after its vulcanisation.
Vulcanisation of rubber does not increase its
Most commonly used rubber vulcanisation agent is
Which one of the following statements is not correct? Vulcanisation of rubber makes it
In vulcanisation process, rubber can be hardened by adding
Vulcanisation of rubber
Vulcanisation of raw rubber makes it
If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, be mixed with 3 kg of metal , of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?