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  1. ...about 5% will run the race in more than 289 mins. b) P( x < 272) => P(z < (272 - 259... are slightly more spread out from the mean than the men 's times. :)>

    1 Answers · Science & Mathematics · 18/09/2020

  2. ...1 - 0.1 < x < 1 + 0.1 0.9 < x < 1.1 0.81 < x² < 1...; 1/2 Fair warning: I am an old man too.

    1 Answers · Science & Mathematics · 22/08/2020

  3. ...when there are only 2 The possible combinations are: 0 men + 3 women = 2C0 x 3C3 = 1 1 man + 2 women = 2C1 x 3C2 = 2 x 3 = 6...

    1 Answers · Science & Mathematics · 15/07/2020

  4. Let y be the tip of the shadow. Let x be the position of the person. Let l be the height of the pole. You have...

    2 Answers · Science & Mathematics · 06/07/2020

  5. a) P( x > 175) => P(z > (175 - 172)/29) i.e. P(z > 0.103) or, 1... standard deviation becomes 29/√n i.e. 29/√20 => 6.48 so, P( x > 175) => P(z > (175 - 172)/6.48) i.e. P(z > 0.46) or...

    1 Answers · Science & Mathematics · 06/06/2020

  6. Hint: P( X =1) = 7 x 9!

    1 Answers · Science & Mathematics · 07/05/2020

  7. P(W and F) = P(F) x P(W\F) so, P(W\F) = P(...

    1 Answers · Science & Mathematics · 16/04/2020

  8. ...day. We know the guy has the 20 employees, so no trouble. 20 x 30 tons = 600 tons moved a day. $5000 / $100 = 50 Type...

    1 Answers · Science & Mathematics · 09/09/2019

  9. a) μ = 69.8 σ = 2.67 z( x =75) = (75-69.8)/2.67) = 1.9475 Answer 1.95 b) P(z<1.9475 = 0.9744 Answer 97.4% c) μ = 64.8 σ = 2.55 z( x =71) = 2.4314 Answer 2.43 d) P(z>2.4314) = 0.0075 Answer 0.8%

    1 Answers · Science & Mathematics · 19/07/2019

  10. ...shadow%3F&source=lnms&tbm=isch&sa= X &ved=0ahUKEwjH7pXexfrfAhWK24MKHfYuBbAQ...hypotenuse of the right triangles. The height of the man is the height of the small triangle. The length...

    3 Answers · Science & Mathematics · 19/01/2019

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