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Posts tagged with maths on trial

Probability to the Defense


So, an appeal was made to the Supreme Court, when it was overturned on the basis of probability arguments. The defense attorney argued that 1/12,000,000 was not the relevant probability (see previous post). In a city the size of Los Angeles, with maybe 2,000,000 couples, the probability was not that small, he argued, that there […]

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Mathematics on Trial


An interesting article from the BBC shows the importance of Mathematical probability in courtroom trials: Read the full article on how Mathematics was used to overturn convictions here.

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NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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