Recent content by Michael805

So if I'm understanding this right, the probability of drawing a ball that was previously drawn would be (X-1)/n, where X is the number of draws? This makes sense to me, but it's just not quite fully clicking for some reason.

Homework Statement There are balls numbered 1 through n in a box. Suppose that a boy successively draws a ball from the box, each time replacing the one drawn before drawing another. This continues until the boy draws a ball that he has previously drawn before. Let X denote the number of...

Correct on both accounts, thank you very much. :)

I have 2 questions, here is the first: Homework Statement A 1.31kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.402m, and the string can support a mass of 34.6kg before breaking. The acceleration of gravity is 9.8ms^2. What...

Homework Statement You and your friend are on top of a roof... You simply drop a balloon from rest. Your friend throws a balloon downward 2.7s later with an initial speed of 52.92m/s. They hit the ground at the same time. Neglect air resistance. How high is the apartment house? 2. The...