a)
To calculate: The probability that there are 5 days in 10 day period, the school bus has to stop at the traffic light..
The probability is 0.2007.
Given:
The percentage that traffic light is red at the driveway leading into the school
The total number of days
Concept used:
A probability distribution where each trial has two possible outcomes known as a success and failure, each trial is independent and the probability of each trial is the same, then to calculate the probability of a certain number of successes occurring, a binomial probability distribution is used as shown below
where k is the number of successes, n is the number of trials and p is the probability of success.
Calculation:
Consider, X be the random variable that shows the number of days the bus will stop at the red light is following the binomial distribution.
The probability that the school bus stops at the traffic light for exactly 5 days in 10-day period is calculated as shown below
Conclusion:
The required probability is 0.2007 (rounded to 4 decimal places).
b)
To calculate: The probability that the school bus stops at the traffic light at least 8 days in 10 day period.
The probability is 0.0123.
Calculation:
The probability that the school bus stops at the traffic light at least 8 days in 10-day period is calculated as shown below
Conclusion:
The required probability is 0.0123 (rounded to 4 decimal places).
Chapter 10 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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- 3 Evaluate the double integral 10 y√x dy dx. First sketch the area of the integral involved, then carry out the integral in both ways, first over x and next over y, and vice versa.arrow_forwardQuestion 2. i. Suppose that the random variable X takes two possible values 1 and -1, and P(X = 1) = P(X-1)=1/2. Let Y=-X. Are X and Y the same random variable? Do X and Y have the same distribution? Explain your answer. ii. Suppose that the random variable X~N(0, 1), let Y=-X. Are X and Y the same random variable? Do X and Y have the same distribution? Explain your answer.arrow_forwardProblem 4. Let f(x, y) = { Find P(X <1/2|Y = 1/2). c(x + y²) 0arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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