Mathematics: Post your doubts here!

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notnek01

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Ahmed Elsiddig said:
someone please do oct/nov 2013 42...qn 6 b (iii)....please explain how the answer is obtained and thnx in advance
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The only possible letters that can appear exactly twice are 'E' and 'N'. Start with 'E':

There are 3 options for 'E' appearing exactly twice :

E, E, not E
E, not E, E
not E, E, E

And similar for 'N' :

N, N, not N
N, not N, N
not N, N, N

For example, P(E, E, not E) = (3/11) x (2/10) x (8/9)

Have a go at the others yourself then add them all up. Let me know if any part doesn't make sense.
 
Kiara P.

Kiara P.

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How can I find the scale factor done for a certain shape (Object) that had been enlarged to an (Image) over a graph?
I heard that you just take the area of both shapes and divide them over each other..
But if that was the answer then how can I calculate the area of the shapes on a graph when no numbers given for the shapes....
 
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