Question

3. A published poll has indicated that 1 out of 15 people who use regular gasoline will pay $.40/gallon more for regular gasoline without ethanol. a. A local service station sells both regular grade gasoline with ethanol and regular grade gasoline without ethanol. What is the probability that the 20th person visiting the service station to purchase regular gasoline will be the 4th person to purchase regular gasoline without ethanol

Answer 1

Answer:

2658936 * $(\frac{14}{15})_{11} ^{12}$

Step-by-step explanation:

probability that the 20th person visiting the service station to purchase regular gasoline will be the 4th person to purchase regular gasoline without ethanol

probability of people who use regular gasoline without ethanol = 1/15 and will pay more ( $0.40) /gallon

The total number of customer in the service station (number of trials) X = 20

success ( r ) = 4

P = 1/15

The probability that the 20th person/customer visiting the station would be the 4th person to purchase regular gasoline without ethanol

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