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TiliK225 [7]
2 years ago
9

Brooke has scores of 84, 72, 90, 95, and 87 on her first five quizzes. After taking the sixth quiz, Brooke’s mean score increase

d.
Which could be Brooke’s sixth quiz score? Select three options.

85
90
83
86
92
Mathematics
1 answer:
nexus9112 [7]2 years ago
6 0
86, 90, and 92

Explanation:add all numbers together and divide it by the amount of numbers there are (5) and it comes out with 85.6 so it has to be higher since it increased
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A package contains 12 resistors, 3 of which are defective. If 4 are selected, find the probability of getting
s344n2d4d5 [400]

Answer:

Incomplete question, but I gave a primer on the hypergeometric distribution, which is used to solve this question, so just the formula has to be applied to find the desired probabilities.

Step-by-step explanation:

The resistors are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

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)!}

In this question:

12 resistors, which means that N = 12

3 defective, which means that k = 3

4 are selected, which means that n = 4

To find an specific probability, that is, of x defectives:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = x) = h(x,12,4,3) = \frac{C_{3,x}*C_{9,4-x}}{C_{12,4}}

7 0
3 years ago
5 Eric is building a fence around the perimeter of a garden in his backyard. The yard is shaped like a rectangle with a width of
Elena L [17]
L=25
If the length is 25 yards then you use 50 yards of fencing for the length, this leaves ten yards for each width of fencing each.
10 yards is 15 yards less than 25 yards showing that this is the correct answer.
5 0
2 years ago
Ten years ago, you purchased a $70,000, 5-year term life insurance policy. At that time you were 30 years old.
Darina [25.2K]

Answer:

a. 14,000

b. 140,000

Step-by-step explanation:

4 0
3 years ago
James wrote the number 8980000 in scientific notation
QveST [7]

Answer:

here u go

Step-by-step explanation:

8.98 x 10^6

4 0
2 years ago
Round 4.68 to the nearest tenth
irina1246 [14]
.60 is above 50 so you round up
4.60 becomes 5.00 if you round it to the nearest tenth 
6 0
3 years ago
Read 2 more answers
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