Mathematics, 18.03.2020 18:12 tristan4233
Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 8 of which have electrical defects and 17 of which have mechanical defects.
(a) How many ways are there to randomly select 6 of these keyboards for a thorough inspection (without regard to order)?
(b) In how many ways can a sample of 6 keyboards be selected so that exactly three have a mechanical defect?
(c) If a sample of 6 keyboards is randomly selected, what is the probability that no more than 2 of these will have an electrical defect?
Answers: 1
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)
Answers: 3
Mathematics, 22.06.2019 03:00, xxaurorabluexx
There are 40 girls and 32 boys who want to participate in 6th grade intramurals. if each team must have the same number of girls and the same number of boys, what is the greatest number of teams that can participate in intramurals? how many girls and boys will be on each team?
Answers: 1
Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair f...
Mathematics, 26.06.2019 08:30
Mathematics, 26.06.2019 08:30
Mathematics, 26.06.2019 08:30