An electronics store receives a shipment of 20 graphing calculators, 8 that are defective. Four of...
An electronics store receives a shipment of 20 graphing calculators, including 3 that are defective. Four of the calculators are selected to be sent to a local high school. A. How many selection can be made using the originial shipment?
An electronic store receives a shipment of 30 graphing calculators, including 6 that are defective. Four of these calculators are selected to be sent to a local high school. How many selections can be made? How many of this selections will contain two defective calculators?
2. Suppose an electronics store receives 30 graphing calculators. a. How many different ways can the store select 4 calculators from among the 30 to send to a customer? b. If 6 of the calculators are defective, how many of the selections contain no defective calculators? c. Use the results of parts a and b to calculate the probability that the customer receives at least one defective calculator. d. How many of these selections contain 1 defective calculators? Combine this...
A shipment of 94 laptops contains 5 defective laptops. A quality control specialist chooses a sample of 9 laptops from the shipment. How many possible choices of 9 laptops can be made? How many of these possible selections will not contain any defective laptops? How many of the possible selections will contain at least one defective laptop? How many of the possible selections will contain exactly one defective laptop?
2. A shipment of 40 fancy calculators contains 5 defective units. In how many ways can a college bookstore buy 20 of these units and receive: a) no defective units b) one defective unit c) at least 17 good units d) What is the probability of the bookstore receiving 2 defective units? e) Find the probability of receiving at most 2 bad calculators. f) Find the probability of receiving at least 4 defective units.
An electronics store has received a shipment of 20 table radios that have connections for an iPod or iPhone. Ten of these have two slots (so they can accommodate both devices), and the other ten have a single slot. Suppose that seven of the 20 radios are randomly selected to be stored under a shelf where the radios are displayed, and the remaining ones are placed in a storeroom. Let X = the number among the radios stored under the...
An electronics store has received a shipment of 20 table radios that have connections for an iPod or iPhone. Ten of these have two slots (so they can accommodate both devices), and the other ten have a single slot. Suppose that eight of the 20 radios are randomly selected to be stored under a shelf where the radios are displayed, and the remaining that have two slots ones are placed in a storeroom. Let X = the number among the...
Out of 100 computers, four are defective. A sample of five is to be selected to be checked for defects. (a) How many different samples can be chosen for inspcction? (b) What is the probability that a random sample will contain at least one defective computer?
Let x be the number of graphing calculators being made by Texas Instrument. When x = 150 calculators are made it costs the company $495 to make them. When x = 280 calculators are made, it costs the company $820 to make them. a) If Cix), the cost function for producing x calculators is a linear function, write C(x) as a linear function of the form C(x) = mx+b. b) P(x), the profit function of dollars for producing x calculators...
Two high school math teachers disagree about the use of hand calculators. Miss Smith maintains that children who use calculators never learn to do arithmetic correctly, whereas Miss Winters maintains that they do. To settle the argument, they selected five students who had calculators and five who did not, and made a totally unwarranted assumption that the presence or absence of calculators was all that distinguished these children. They then gave each child three 10-point tests (addition, subtraction and multiplication),...