Answer:
The probability that exactly 2 of 5 use their smartphones in meetings or classes is 0.3442.
Step-by-step explanation:
Let <em>X</em> = number of adults who use smartphones in meetings or classes.
The probability of the random variable <em>X</em> is, P(X) = <em>p</em> = 0.42
A sample of <em>n</em> = 5 adult smartphone users are selected.
The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.
The probability mass function of <em>X</em> is:
Compute the value of P (X = 2) as follows:
Thus, the probability that exactly 2 of 5 use their smartphones in meetings or classes is 0.3442.
Answer:
The ratio in its simplest from is 4:5
Step-by-step explanation:
Now, let’s pick an arbitrary value for the total number of students in that class.
Let’s say we have 45 students in the class
The number of women would be 5/9 * 45 = 25
The number of men would be 45-25 = 20
So the ratio of men to women would be;
20:25 which in its simplest form = 4:5
Answer:
30.2 aka C
Step-by-step explanation:
The formula for the area of a circle is A = pir^2. Knowing this we can create the equation A = 3.14(3.1)^2. Following PEMDAS square 3.1 to get 9.61. Then you multiply 9.61 with 3.14 to get 30.1754. When you round to the nearest tenth you get 30.2.
Answer:
oof im so sorrry, good luck with the test
Step-by-step explanation:
4 + 3x = 12
3x = 12 - 4
3x = 8
x = 8/3
x = 2,6 grams
