42 + 90 +x = 180
x = 180 - 132
x = 48
see picture:
x = 180 - 132
x = 48
see picture:
Discrete Math please help
1 answer:
Considering the given operations, the discrete sets are given as follows:
- A = {1,3,5,6,7,8,9}.
- B = {2,3,6,9,10}.
It is the operation of elements that are in set A but not in set B, hence, since A - B = {1, 5, 7, 8}, we have that:
A = {1,5,7,8}
<h3>What is operation B - A?</h3>It is the operation of elements that are in set B but not in set A, hence, since B - A = {2,10}, we have that:
B = {2,10}
<h3>What is the intersection operation?</h3>It contains the elements that are in both sets, hence, since , we have that the sets are completed as follows:
- A = {1,3,5,6,7,8,9}.
- B = {2,3,6,9,10}.
More can be learned about discrete math at brainly.com/question/13309484
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Answer:
The mean and the standard deviation of the number of students with laptops are 1.11 and 0.836 respectively.
Step-by-step explanation:
Let <em>X</em> = number of students who have laptops.
The probability of a student having a laptop is, P (X) = <em>p</em> = 0.37.
A random sample of <em>n</em> = 30 students is selected.
The event of a student having a laptop is independent of the other students.
The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.
The mean and standard deviation of a binomial random variable <em>X</em> are:
Compute the mean of the random variable <em>X</em> as follows:
The mean of the random variable <em>X</em> is 1.11.
Compute the standard deviation of the random variable <em>X</em> as follows:
The standard deviation of the random variable <em>X</em> is 0.836.