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Posts tagged with lottery

Math Wizz used Probability to Beat Lotto

December31

Romanian economist Stefan Mandel was struggling to make ends meet. So he came up with an unlikely solution — winning the lottery. But while most people who dream of scooping the jackpot rely on dumb luck, Mandel had other ideas. Mandel spent his spare time poring over probability papers penned by mathematician Leonardo Fibonacci — […]

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Lightning and Lotteries – What are the odds?

November23

The Mathematics of Probability is a fascinating one, and every day we take our chances in a variety of different situations (actually, some of our students take big chances every day, simply by running around corners without looking!). Impossible means a probability of 0; while certainty is a probability of 1.0 – that is, every […]

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Winning the Lottery – what are the chances?

September21

By the numbers (adapted from The New Zealand Herald) Lotto balls: 40 Balls needed to win Lotto: 6 Powerball balls: 10 Most common Powerball number drawn: 2 Biggest jackpots • Biggest Powerball jackpot: $34.8 million in 2011 (shared by two players). • Biggest individual Powerball prize: $28 million in 2010 (won by a single player). • […]

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Post Support

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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