Answer:
34.87% probability that all 5 have a wireless device
Step-by-step explanation:
For each student, there are only two possible outcomes. Either they own a wireless device, or they do not. The probability of a student owning a wireless device is independent from other students. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which 
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
81% of students own a wireless device.
This means that 
If 5 students are selected at random, what is the probability that all 5 have a wireless device?
This is P(X = 5) when n = 5. So
34.87% probability that all 5 have a wireless device
Answer:
1 on 3
Step-by-step explanation:
The red dice has 6 faces. The number you have to obtain is less than 3. So your answers must be 1 and 2. The numbers 1 and 2 are two solutions out of six. Now the same goes with the white dice. Two solutions out of six. You combine them and obtain 4 on 12. Then, you reduce the answer in minimal terms and finally obtain 1 on 3.
Answer:
12
Step-by-step explanation:
+ ![\sqrt[3]{64}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B64%7D)
= 8 + 4
= 12
Answer: B
Step-by-step explanation:
The shorter arrow is the hour while the longer arrow is the minutes. Since the shorter arrow is between one and two, the hour would be one. The clock goes by minutes, and each of the dashes are a minute. There are 60 dashes for 60 minutes. From 12 to 1, it's 5 minutes. It's the same for 1 to 2, 2 to 3, and so on. So 7 × 5 is 35 + 4 is 39, where the longer arrow is placed. So the time is 1:39.
