鬼馬神仙車

昨天上午我開車到城外。當我開車開到時速八十公里以上時,汽車開始有點震動,令我有點害怕。因此,我謹慎地慢駛。

午餐後,這個問題神奇地消失了!你知道這是為什麼嗎?

猜中無獎。哈哈。

(魔術的秘密:見評論)

11 Responses to 鬼馬神仙車

  1. assenav says:

    English Chinese….
    開車出城外 >>> 開車出城 or 開車到城外
    每小時八十公里 >>> 時速八十公里
    令有點害怕 >>> 令我有點害怕???
    慢慢和謹慎地駕駛 >>> 謹慎地慢駛

    Actually, great improvement already. So I will be picky from now on, haha…

  2. kempton says:

    assenav,

    謝謝您更正我的中文。我照單全收。

    請同時讀一讀我的內容以及評論評論。謝謝。

  3. assenav says:

    我唔鍾意評論,唔好逼我,哈哈

  4. kempton says:

    assenav,

    You are a funny gal. :) I won’t force you.

    P.S. On an unrelated point, you know CFA level 3 is all about comment, critique and analyze of the problems and issues, right? :)

  5. assenav says:

    P(passing level 1) = 0.35
    P(taking level 2) = 0.5
    P(passing level 2) = 0.4
    P(taking level 3) = 0.8***

    so the probability of me taking level 3 exam will be 5-6%. 到時先算啦!

    *** if i pass level 2, the opportunity cost of not taking level 3 will be much higher, so probability will be higher.

    i hope i did it right, i m such a mathe idiot

  6. Joanalist says:

    What’s the temperature at that time? You didn’t warm your car?

  7. kempton says:

    Hi Joanalist,

    It was cold in the morning. I didn’t warm my car but it was driving ok for 15-20 minutes already.

    Hi assenav,

    ha ha, best of luck la.

    P.S. Your probability spec is probably too loose.
    “P(taking level 2) = 0.5” You want to say only 50% of people who takes level 1 (and pass) will take and try level 2, correct?

    Having fun studying.

  8. assenav says:

    no, it means only 50% pobability for me (only me) to take level 2 exam IF i can pass level 1.

    u are right, after revising it, i should make it like this:

    scenario 1 > i pass level 1 and 2
    P(passing level 1) = 0.35
    P(taking level 2) = 0.5
    P(passing level 2) = 0.4
    P(taking level 3) = 0.8

    scenario 2 > i fail level 1
    P(failing level 1) = 0.65
    P(me taking level 1 again) = 0.8
    P(passing level 1) = 0.35
    P(taking level 2) = 0

    scenario 3 > i fail level 2 after pass level 1
    P(passing level 1) = 0.35
    P(taking level 2) = 0.5
    P(failing level 2) = 0.6
    P(taking level 2 again) = 0

    the result doesn’t change, but it looks better, haha…

    anyway, just for fun, haha…

  9. kempton says:

    Vanessa, You are too funny. You want to turn this entry into 鬼馬 Math 巴士? Ha ha.

  10. gwenzilla says:

    i am not a car person…mm…. i wonder if this have anything to do with forgot to release the hand brake….OR… something dangling under the car… and it was gone later on?? mm…. i give up!! i am very bad with guessing game!!

  11. kempton says:

    gwenzilla,

    Nice try on the hand brake but not really. When you forget the handbrake, your car won’t go as fast and the car will seem very sluggish and you may smell your handbrake being wear out.

    OK, here is what happened. When I described the problem to my friend who was a former car mechanic, he immediately suggested it could be a wheel-balancing problem. When the wheel is not “balanced”, the wheel will spin in an wabbly manner and shake the car crazy.

    I almost was going to pay a shop $15 per wheel x 4, $60 to balance the wheels but I had to go on highway and take care of something first. And then I noticed when the car was driving at 120km/hr there was still no shakes. Why?

    The only reason I can think of is there were likely snow stuck in the rim of the wheels which unbalanced the wheels. The morning weather was still too cold to melt the snow. But the sun was hot enough to melt the snow after lunch.

    So shaky wheels can be caused by unbalanced wheels. And in colder climate like Calgary, snow can stick to rims of cars and unbalancing the wheels as a result.

    I learned (and saved some money) something yesterday.

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