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Poe
A math quiz I read a tweeter about a quiz in GCSE.And those guys consider it as something serious.There's a comment goes like'My mum works for an accountancy company and it took 4 accountants 2hrs to answer the sweets Q.They have maths degrees'.Then many Chinese started to poke fun at them.Cause it's just basic math quiz for Chinese teenagers. I'm not showing off how the math education appears to be successful in China here,just kind of wonder if it's true.I used to watch some videos about probability theory class in European schools.Those students are not this lame.So I assume it's totally a hooey. There are n sweets in a bag. 6 of the sweets are orange. The rest of sweets are yellow. Hannah takes at random a sweet from the bag. She eats the sweet. Hannah then takes at random another sweet from the bag. She eats the sweet. The probability that Hannah eats two orange sweets is 1/3. (a)Show that n²-n-90=0 It can't be easier,6/n*5/(n-1)=1/3 and here it is n²-n-90=0
Jun 9, 2015 8:08 AM
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