Mathematics, 14.10.2019 04:00, JussSplash1340

You have 7 pairs of socks in the dryer. only one pair is black. you randomly choose two of the socks. what is the probability that you got both of the black socks?

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Mathematics, 21.06.2019 18:00, vianney84

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Mathematics, 22.06.2019 01:00, SpeechlessZzz9920

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)

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You have 7 pairs of socks in the dryer. only one pair is black. you randomly choose two of the socks...