Answer:
0.1502 = 15.02% probability that exactly 13 of them use their smartphones in meetings or classes
Step-by-step explanation:
For each adult smartphone users, there are only two possible outcomes. Either they use the phone in meetings or classes, or they do not. The probability of an adult using the phone in these settings is independent of any other adult. This means that 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.
58% use them in meetings or classes
This means that 
20 adult smartphone users are randomly selected
This means that 
Find the probability that exactly 13 of them use their smartphones in meetings or classes.
This is 
. So
0.1502 = 15.02% probability that exactly 13 of them use their smartphones in meetings or classes
Answer:
68
Step-by-step explanation:
Hope this helps! Pls give brainliest!
Answer: im guessing you need the amount of compound b
Step-by-step explanation:
1 think out problem
compound A =222m compound B=3 milliliters of compound A used for every 2 milliliters of compound B
write compound B as an equation which is:
a=3+2b
compound a equation is: a=222
to continue you have to make compound B equation equal b
a=3+2b
-2b -2b
a-2b=3
-a -a
-2b/-2=3/-2-a/-2
b= -3/2+a/2
i am working on the substitution method: so now you substitute variables
problems are: b=-3/2+a/2 and a=222
substute a for a: b=-3/2+222/2
b=109.5
a=222
<u>compound A=222</u>
<u>compound B=109.5</u>
<u>add both for final answer or whatever: 109.5+222= 331.5</u>
<em>sorry for the long complicated answer hope you understand. i tried my best it should be right. sorry if my answer is wrong. </em>
I'm pretty sure the answer is c=1.85. I'm sorry if I'm wrong. But I'm pretty sure it's right
Answer:
<h2>5/18 pounds per person.</h2>
Step-by-step explanation:
Givens
- Karen split (divides) 5/6 pounts of candy among 3 people.
The problem already says what to do, we need to divide because that's what Karen is doing, she is spliting or dividing the pounds of candy for 3 people. So, we just need to divide 5/6 by 3,
Therefore, the unit rate in pounds per person is 5/18 pounds, because Karen divided 5/6 pounds amon 3 people.
