Re: [計量] 印度網站again~
※ 引述《KRZYSZ (VICTORIA)》之銘言：
: hi~我又肥來了~
: Given a quadrilateral with sides 9, 9, 8 &1.
: Col A: Angle between the sides 9 and 9
: Col B: 60
: Ans: D
: I think the answer is wrong, right?
: Draw a diagonal X
: Since the sum of two sides is greater than the third side => 8+1> X
: difference of two sides is less than the third side => X>8-1
: Therefore, 9>X>7, the diagonal won’t be equal to 9. the angle, hence,
: the angle will be less than 60 degree.
: Is this right?
B+1
: Given that heights of 60 men, 60 women both have normal distributions and if
: the Standard Deviation of them is 10 each, then
: Col A: Standard Deviation of a random sample of 30 men, 30 women
: Col B: 9
: Ans: D
直觀來看是不確定的 還請大神用數學證明之
: If there are 'c' cartons and each carton has 'x' boxes which is being loaded
: in a truck in 'h' hours and 't' minutes, then
: Col A : The average time for loading the 'x' boxes of all cartons
: Col B: cx /(h+t/60)
: Ans: D
: i got the same answer as Col B ._.
: why isn't the answer C?
average "time":
(h+t/60) / cx
所有未知數都未知 不能比較
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05/29 11:10, , 1F
05/29 11:10, 1F
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