a. The multiplication of these probabilities is justified because the inspections are isolated or don't have the same goal. For instance p1, would mean that not all the planes are checked, p2 that not all the parts in the plane are checked, and p3, that even if the the part where the crack could be inspected, people checking it could not notice it or it could be not identified easily.

b. As the events are independent and there are only two possible answers (detect the plane or not), a binomial distribution could be applied, therefore:

p=0.9*0.8*.5=36 (probability of detecting the crack)

n=3 (number of possibilities, in this case number of planes)

The probability in a binomial formula is given by

$P(X=x)=\frac{n!}{(n-x)!x!}*p^{x}*(1-p)^{n-x}$

Considering that the only possibility that is not being asked is the one of not detecting any crack which would mean x=0, then, we could find the probability as

$P(X\geq 1)$ =1- $P(X=0)$

$P(X\geq 1)=1-P(X=0)=1-\frac{3!}{3!0!} *0.36^{0} *0.64^{3} =0.737856$

Probability is then 0.737856

Step-by-step explanation:

5 0

3 years ago

OMGGGGGGGGGG help me

Leno4ka [110]

Answer:

sin 39 = BS / 500

0.629320391 * 500 = BS

BS = 314.6601955 feet

ie. h = 314.66 feet

5 0

3 years ago

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What is a stock index? a. The average change in a stock’s price over a given period. b. An indicator of market strength based on

sweet [91]

The answer is B. It is also called as the stock market index, it is an estimation of the value of a section of the share trading system. It is processed from the costs of chose stocks. It is an instrument utilized by speculators and money related chiefs to portray the market and to think about the arrival on particular ventures.

8 0

4 years ago

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Soren has 2 jobs. During the day, he works as an office clerk. In the evening, he works as a cashier. His office job pays him $1

goldenfox [79]

I'm pretty sure the answer is B) 11c+8.5(c-46)=470
hope i help :)

7 0

3 years ago

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