Im confused can someone explain this to me ...
2 answers:
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Answer:
c. 2
Step-by-step explanation:
Given : X = No. of hours worked
No. of people work for the manager = 50
X = 3, 4 , 5 , 6 , 7, 8
P(X) = 0.1 , ? , 0.14 , 0.3 , 0.36 , 0.06
To Find : No. of people work for four hours
Solution : First understand the fact that sum of all probabilities is equal to 1
So, sum of all values of P(X) = 1
⇒
⇒
⇒
⇒
So, the probability of no. of people worked for 4 hours is 0.04.
⇒P(4)=0.04
Thus , To calculate no. of people work for four hours :
⇒ 2 no. of people work for four hours per shift .
The probability of a negative result for a batch will be "0.3487".
Given values are:
Positivity rate,
- p = 10% or, 0.1
Batch size,
- n = 10
Now,
The probability of negative result will be:
→
By substituting the values, we get
→
→
→
Thus the answer above is right.
Learn more about the probability here: