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A purse contains 4 silver and 5 copper coins.A second purse contains 3 silver and 7 copper coins.If a coin is taken out at random from one of the purses,what is the probability that it is a copper coin?
This question has multiple parts. Therefore each part has been answered as a separate question on Clay6.com
isc
class12
modelpaper
2011
sec-a
q8
q8-a
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Apr 11, 2013
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sreemathi.v
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Apr 15, 2013
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Apr 12, 2013
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isc
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Apr 17, 2013
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The position vectors of the vertices of a triangle are given as $2\hat{i}-\hat{j}+\hat{k},\hat{i}-3\hat{j}-5\hat{k}$ and $3\hat{i}-4\hat{j}-4\hat{k}$.Prove that it is a right-angled triangle.
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