Answer:
a) The probability that at least 5 ties are too tight is P=0.0432.
b) The probability that at most 12 ties are too tight is P=1.
Step-by-step explanation:
In this problem, we could represent the proabilities of this events with the Binomial distirbution, with parameter p=0.1 and sample size n=20.
a) We can express the probability that at least 5 ties are too tight as:

The probability that at least 5 ties are too tight is P=0.0432.
a) We can express the probability that at most 12 ties are too tight as:

The probability that at most 12 ties are too tight is P=1.
 
        
             
        
        
        
Answer:
A. x=0
Step-by-step explanation:
x+20+10x=20+9x
cancel equal terms
x+10x+9x
add x to 10x
11x=9x
move variable to left
11x-9x=0
subtract 11x to 9x
2x=0
divide Both sides by 2
x=0
 
        
             
        
        
        
Answer:
C, 15
Step-by-step explanation:
i looked it up
 
        
             
        
        
        
Answer:
30/10 and 5/11
Step-by-step explanation:
 
        
             
        
        
        
Answer:
im sorry this might not be exactly correct but the answer can be 1,050,609
Step-by-step explanation:
1 week= 7 days so
150,087 × 7 = 1,050,609
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