Answer:
0.00621
Step-by-step explanation:
We solve the above question using the
Z score formula. This is given as:
z = (x-μ)/σ/√n
where
x is the raw score = 12.20 or earlier
This means x ≤ 12.20
μ is the population mean = 13.20
σ is the population standard deviation = 2
n is the random number of samples = 25
z = 12.2 - 13.2/2/√25
z = -1/2/5
z = -1/0.4
z = -2.5
Probability value from Z-Table:
P(x≤ 12.2) = 0.0062097
Approximately = 0.00621
Therefore, the probability of randomly selecting a sample of 25 children who stood on their own by the average age of 12.2 months or earlier is 0.00621
Answer:
A.
Step-by-step explanation:
Answer:
Rational number
Definition:
A rational number is the one which can be written in the form of (fraction) p/q, following the condition that q (denominator) must not be equal to zero. (because something divided by 0 gives infinity)
Examples: 3, 2/7, 12345/67
- A simple integer can also be said as a rational number, taking 1 as its denominator. Like 5 is a rational number having p/q form as 5/1
I hope it will help you!
0.63x12= 7.5 so the answer is 7.5
Answer:
x = 23
Step-by-step explanation:
First you need to subtract 12 from both sides (Easy right!)
12 - 2x = -34
-12 -12
-2x = -46
Then you need to divide by -2 to get x by itself of the left side
-2x = -46
/2 /2
x = 23
Do you need any more explaining?
Hope this helps!!!
-Unicorns110504
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