Answer:
(-2, -4.5)
Step-by-step explanation:
The value that is 2 standard deviations from the mean is; 130
<h3>What is Empirical Rule?</h3>
For this question, we will use Z-score and as such whether the value is below or above mean (shown by positive or negative sign) and by how much (times the standard deviation).
Thus;
Calculated value = μ + zσ
where;
μ is mean
σ is standard deviation
Hence, the value that would be +2 standard deviations from the mean is;
Calculated value = 100 + 2(15)
Calculated value = 130
Read more about Empirical Rule at; brainly.com/question/10093236
A - b is NOT always natural. Eg 4 - 7 = -3 therefore not in the natural number set.
ab is always natural
a/b is NOT always natural. Eg 4/7
So the answer to the question is (b) only II must be a natural number answer.
Answer:
P (not green) = 17/20
Step-by-step explanation:
Given the following number of marbles:
Green : 3
Yellow : 4
Blue : 5
Pink :8
Total number of marbles = 3 + 4 + 5 + 8 = 20 marbles
if we draw 1 marble at random from the bag, the probability that the marble IS green,
P(Green) = 3/20
The probability that the marble is NOT green is,
P(Not Green)
= 1 - P(Green)
= 1 - 3/20
= 17/20
X = # of men x + (x + 25) = 115 2x + 25 = 115 2x = 90 x = 45 45 + 25 = 70 so there's 70 women