Recent content by Jimerd

  1. J

    What Are the Probability Mass Functions for Randomly Selected Marbles?

    This is what I got for part (a) F(x)= 3Ck * 0.5^3 F(y)=3Ck * 0.667^3 F(z)=3Ck * 0.167^3 Now for part (b) I have some problems, I don't know if I got all the possible outcomes RRR RRG RGR GRR GGG GGR GRG RGG RGY RYG GYR GRY YRG YGR YYR YYG YRY RYY YGY GYY YYY I...
  2. J

    What Are the Probability Mass Functions for Randomly Selected Marbles?

    Yes, thank you. I put it into the formula and it gave me the correct answer :)
  3. J

    What Are the Probability Mass Functions for Randomly Selected Marbles?

    A box contains 12 marbles. Six of the marbles are red, four are green, and two are yellow. Suppose that you choose three marbles at random. let x be the number of red marbles in the sample, y be the number of green marbles, and z be the number of yellow marbles. a. Give the precise formulas...
  4. J

    Find t in a Parametric Equation

    Homework Statement Find parametric equations for the tangent line to the curve with the given parametric equations at the specified point. x = 6 cos t, y = 6 sin t, z = 6 cos 2t; (3√3, 3, 3) Homework Equations The Attempt at a Solution So I understand that r(t)= 6cost t, 6sint...
  5. J

    Superposition of Electric Fields

    I know this problem is simple enough but I can't get the hang of it Find the electric field at point A in the diagram if (a) q1=2.00 μC and q2=3.00 μC. (b) q1=2.00 μC and q2= -3.00 μC. Thank you. P.S. If you can explain how you solved the problem that would be great. I'd really like to know...
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