Each of 12 refrigerators of a certain type has been returned to a distributor because of the presence of a high-pitched oscillating noise when the refrigerator is running. Suppose that 5 of these 12 have defective compressors and the other 7 have less serious problems. If they are examined in random order, let X = the number among the first 6 examined that have a defective compressor. Compute the following:
a. $P$
(X = 1)
b. $P ( X \geq 4 )$

Question

Each of 12 refrigerators of a certain type has been returned to a distributor because of the presence of a high-pitched oscillating noise when the refrigerator is running. Suppose that 5 of these 12 have defective compressors and the other 7 have less serious problems. If they are examined in random order, let X = the number among the first 6 examined that have a defective compressor. Compute the following:
a. $P$ 
(X = 1) 
b. $P ( X \geq 4 )$

Quizplus · Accepted Answer

The Answer of Each of 12 refrigerators of a certain type has been returned to a distributor because of the presence of a high-pitched oscillating noise when the refrigerator is running. Suppose that 5 of these 12 have defective compressors and the other 7 have less serious problems. If they are examined in random order, let X = the number among the first 6 examined that have a defective compressor. Compute the following:
a. $P$ 
(X = 1) 
b. $P ( X \geq 4 )$

Each of 12 Refrigerators of a Certain Type Has Been PPP

Each of 12 Refrigerators of a Certain Type Has Been $P$