The probability that a certain production process will
A multiple-choice quiz has 15 questions, each with 4
produce a defective part is 0.20. If a box contains 12
possible answers of which only 1 is the correc t answer.
parts, the probability that it will contain 6 defective
What is the probability that a student gets at least 1
parts is binomial 0.0155
correct answer? 0.9866
Suppose that airplane engines operate independently in
In a certain city district, the need for money to buy
flight and fail with probability 1/5. Assuming that a
drugs is given as the reason for 6 5% of all thefts. What
plane makes a safe flight if at le ast one-half of its
is the probability that exactly 2 of the next 4 theft cases
engines run, what is the probability that 4-engine plane
reported in this district resulted from the need for
has a successful flight? Binomial 0.9728
money to buy drugs? 0.3105
A math teacher observes that on the average 3 students
A coin is tossed 4 times, the probability that all heads
came to their 8-9AM class late. The probability 5
and all tails will appear is 0.125
students will be late in their 8-9AM class is 0.1008 A math teacher observes that on the average 3 students A multiple-choice quiz has 15 questions, each with 4
came to their 8-9AM class late. The probability that at
possible answers of which only 1 is the correc t answer.
most 2 students will be late in their 8-9AM class 0.4232
What is the probability that a student gets exactly 8 correct answers? 0.0131
The probability that a certain production process will produce a defective part is 0.20. If a box contains 12
A store owner complains that, on the average, 3 bottles
parts, the probability that there will be 6 or 7 defective
per case of a ce rtain brand of softdrink are underfilled.
parts is binomial 0.0155
Assuming this is correct, find the probability that a randomly chosen case of this drink will contain at least 4 underfilled bottles. 0.3528 A coin is tossed 3 times and let X be the number of heads appearing. The probability that 1 head will appear is 0.375
Put your answers in 4 significant figures (e.g. 1/15 = 0.0667): On the average, 7 people per hour use an express teller machine situated inside a commercial complex. What is the probability that, from 3:00-4:00pm on Friday, exactly 7 people will use the t eller machine? Poisson
Put your answers in 4 significant figures (e.g. 1/15 =
0.1490
0.0667): On the average, 6 people per hour use an express teller Suppose that airplane engines operate independently in
machine situated inside a commercial complex. What is
flight and fail with probability 1/5. Assuming that a
the probability that, from 3:00-4:00pm on Friday, at
plane makes a safe flight if at le ast one-half of its
most 4 people will use the machine? 0.2850
engines run, what is the probability that 2-engine plane has a successful flight? 0.96
Put your answers in 4 significant figures (e.g. 1/15 = 0.0667): A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the correc t answer. What is the probability that a student gets 7 to 11 correct answer? 0.0566
