Answer:
The probability that at least one 5 will appear in 4 rolls of die equals 
Explanation:
The given question can be solved by Bernoulli's trails which states that
If probablity of success of an event is 'p' then the probability that the event occurs at least once in 'n' successive trails equals
Since in our case the probability of getting 5 on roll of a die equals 1/6 thus we have p = 1/6
Applying the values in the given equation the probability of success in 4 rolls of die is thus given by
A smart-phone is also referred to as a mobile device and it can be defined as a small, portable, programmable-electronic device that is designed and developed for sending (transmission) and receiving data (messages) over a network. Thus, a smart-phone must be designed as a hand-held device with communication capabilities.
Basically, the components that make up a smart-phone can be classified into two (2) main categories and these include:
1. <u>Input:</u> it comprises mouthpiece, keyboard, light sensor, etc.
2. <u>Output:</u> it comprises screen, speaker, earpiece, etc.
In this context, an end user would interact with a smart-phone in the following ways to perform (do) various tasks:
- By using a keyboard to type a text and then sending it to another person.
- By using a mouthpiece as an input for voice (audio) messages when making call.
- The screen of a smart-phone displays the necessary information to an end user.
- When playing a digital music file the speaker produces the output as sound.
Read more on smart-phone here: brainly.com/question/4922532
Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator 
and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
![$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$](https://tex.z-dn.net/?f=%24%5Cpi%20%5B%5Csigma_%7B%5Ctext%7Bstudent%27s%20nam%7De%7D%20%5B%20%5Csigma%28%5Ctext%7Bthree%20courses%7D%29%20%5CJoin%20%5Ctext%7B%22Philosophy%22%7D%5D%5D%24)
1. The General Market is Down This is for the most part the most evident reason that a stock is underestimated and happens when the large scale perspective of the economy is poor. It is helpful for financial specialists to have some fundamental apparatuses to esteem the general market so they can get ready as the market progresses toward becoming underestimated.
Isolation. Also is known as Lockout-Tagout. I hope this helps.
