Giving brainlest and 20 points
1 answer:
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Answer:
1.8 and 14.3
Step-by-step explanation:
Our equation is a quadratic equation so we will use the dicriminant method
- Let Δ be our dicriminant
- a=1
- b= -16
- c= 25
- Δ= (-16)²-4*25*1=156≥0
- so we have two solutions : x and y
- x= (16-
)/2= 1.7555≈ 1.8
- y=(16+
<h2>Answer with explanation:</h2>
Given : The probability that telephone bills mailed to house-holds in Hong Kong are incorrect.=0.01
<h2>Binomial distribution :-</h2>
If a sample of 10 bills is selected, then the probability that at least one bill will be incorrect :-
Hence, the probability that at least one bill will be incorrect =0.6513
<h2>Poisson distribution: </h2>
Mean :
Then , If a sample of 10 bills is selected, then the probability that at least one bill will be incorrect :-
Hence, the probability that at least one bill will be incorrect =0.6321