Any value which is more than 2 standard deviations away from the mean is considered to be "unusual."
2 standard deviations above the mean 52.4 mp would be 52.4+2(1.8), or 56; 2 std devs below the mean would be 52.4 - 2(1.8), or 48.8. Thus, any value larger than 56 or any value smaller than 48.8 would be "unusual."
54.8, 49.1 and 51.3 are not unusual; 56.5 is unusual, because it's greaster than 56.
It wouldn't be 1042 because 60×20 alone is 1200 so 1042 is not correct
Answer:
The time taken by both boys to complete work = 2.73 hours
Step-by-step explanation:
Time taken by rayan to dig hole
= 5 hours
Time taken by castel to dig hole
= 6 hours
Now the time taken by both persons working together
![T = \frac{T_{1} T_{2} }{T_{1} + T_{2}}](https://tex.z-dn.net/?f=T%20%3D%20%5Cfrac%7BT_%7B1%7D%20T_%7B2%7D%20%20%7D%7BT_%7B1%7D%20%2B%20T_%7B2%7D%7D)
Put all the values in above formula we get
![T = \frac{ 30 }{6 + 5}](https://tex.z-dn.net/?f=T%20%3D%20%5Cfrac%7B%2030%20%7D%7B6%20%2B%205%7D)
![T = \frac{30}{11}](https://tex.z-dn.net/?f=T%20%3D%20%5Cfrac%7B30%7D%7B11%7D)
T = 2.73 hours
Therefore the time taken by both boys to complete work = 2.73 hours
A. would be the correct option because it would have to lowest overall cost including the down payment and the weekly payments.
It is just the name of the angle
angle RAB- A is the point and R and B are one of the ends
same with angle NAB, A is the point and N and B are one of the ends