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Murrr4er [49]
2 years ago
13

The factory makes light bulbs the probability that a bulb is defective is 1/15 if 300 light bulbs are tested about how many are

expected to be defective
a 20

b 66

c 15

d 30
Mathematics
2 answers:
irga5000 [103]2 years ago
8 0
defective : working = 1/15 ( x20 ) 20/300
so the answer is 20 light bulbs
NARA [144]2 years ago
8 0
A) you can make a ratio of 1/15 = x/300

300x1 = 300

300/15 = 20
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Mnenie [13.5K]

Answer:

All numbers can be written as a product of the prime numbers that conform them.

A) Find two numbers with a common factor of 3 only.

for example:

2*3 = 6

7*3 = 21

Both numbers have the factor 3 in them, and because the other two numbers are primes, we can be sure that the 3 is the only common factor.

B) Write a pair of numbers with a common factor of 2, 3 and  6.

Here we can write:

2*3*2 = 12

3*2*5 = 30

Those two numbers have the common factors 6, 2 and 3.

C) Write a pair of numbers with common factors of 3, 6 and  9.​

3*2*3 = 18 (has the factors 2, 3, 3*2 = 6, 3*3 = 9)

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Both have the common factors 3, 6 and 9 (and they share more common factors like 2, this happens because 6 = 3*2, so if 6 is a common factor, 2 also must be)

8 0
3 years ago
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Contact [7]

Answer:

c

Step-by-step explanation:

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5 0
3 years ago
Given the equation 5 + x - 12 = x- 7.
marusya05 [52]

Answer:

Step-by-step explanation:

5 + x - 12 = x- 7 (Add the 5 and -12 to simplify)

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x = x

solution is all real numbers

Part B

5 - 4 - 12 = -4 - 7

-11 = -11

5 + 0 - 12 = 0 - 7

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5 + 5 - 12 = 5 - 7

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8 0
3 years ago
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sdas [7]
First, you find the volume of each individual cube, and then you add everything up.  

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hope this helped :)
3 0
4 years ago
I need help please.
nignag [31]

Answer:

it might be A but dont trust me

Step-by-step explanation:

8 0
3 years ago
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