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Mars2501 [29]
3 years ago
7

Evaluate the expression 4 ÷ 2 + 52.

Mathematics
2 answers:
maxonik [38]3 years ago
7 0

Answer:

54

Step-by-step explanation:

4  divided by 2=2+52=54

ch4aika [34]3 years ago
5 0

Answer:

54

Step-by-step explanation:

4 ÷ 2 + 52

Order of operation

=  2 + 52

= 54

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Answer:

0.0025 = 0.25% probability that both are defective

Step-by-step explanation:

For each item, there are only two possible outcomes. Either they are defective, or they are not. Items are independent of each other. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

5 percent of these are defective.

This means that p = 0.05

If two items are randomly selected as they come off the production line, what is the probability that both are defective

This is P(X = 2) when n = 2. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{2,2}.(0.05)^{2}.(0.95)^{0} = 0.0025

0.0025 = 0.25% probability that both are defective

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Step-by-step explanation:

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