What is the probability that in a period of 100 days, the average number of red lights encountered is more than 2 per day?
A commuter encounters four traffic lights each day on her way to work. Let X represent the number of these that are red lights. The probability mass function of X is as follows.
You might also like to view...
You had 75 acres of peanut plants baled for hay. The bale has a diameter of 46 inches and a width 48 inches. The bale is covered with a white plastic sleeve with the ends open.
a. What is the volume of a bale in cubic feet? b. What is the area of the plastic sleeve in square feet?
Technician Asays a normally open switch is used in most coolant temperature warning light circuits. Technician B says most oil pressure warning circuits use a normally closed switch. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
Technician A says that a two-wire variable resistor is called a rheostat. Technician B says that a three-wire variable resistor is called a potentiometer. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What friction rate should be used to size a duct for a design friction rate of 0.12 in WC if the duct has a total equivalent length of 150 ft?
A) 0.12 × (150/100 ) = 0.12 × 1.5 = 0.18 in WC B) 0.12 × (100/150 ) = 0.67 × 0.12 = 0.08 in WC C) 0.1 in wc because that is the standard factor D) 0.12 in WC because the duct length is irrelevant