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The symbols ∪ and ∩ respectively, mean a) ∪ is Union: is in either set ∩ is Intersection: must be in both sets b) ∩ is Union: is in either set ∪ is Intersection: must be in both sets c) ∪ is Union: must be ...
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Out of 800 boys in a school, 224 played cricket, 240 played hockey and 336 played basketball. Of the total, 64 played both basketball and hockey; 80 played cricket and basketball and 40 played cricket and hockey; 24 played al ...
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A person is jumping and another person is in a helicopter just vertically above that jumping man. Then according to the man in the helicopter the jumping man is in a) rest b) motion c) both d) none ...
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A substance that cannot be broken down into a simpler form by ordinary chemical means is called a(n) a) element b) compound c) mixture d) none of the above ...
