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Thepotemich [5.8K]

3 years ago

6

A quality control technician checked a sample of 30 bulbs. Two of the bulbs were defective. If the sample was a representative,

find the number of bulbs expected to be defective in a case of 450.
A.) 30
B.) 24
C.) 36
D.) 45

1 answer:

bogdanovich [222]3 years ago

4 0

I think that 30 bulbs are expected to be defective.

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The admission fee at an amusement park is $1.50 for children and $4 for adults. On a certain day, 281

777dan777 [17]

This is what i get, hope it help

5 0

3 years ago

A carton has a length of 2 1/4 feet, width of 1 3/5 feet, and height of 2 1/3 feet. What is the volume of the carton?

Alik [6]

Multiply 2 1/4, 1 3/5 and 2 1/3 together! It would be easier to turn these mixed fractions into improper fractions.

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4 years ago

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this seq

frez [133]

<h3>Answer: 144</h3><h3>Step-by-step explanation:</h3><h3 />

Since, the first 9 multiple of 4 starts from 0 are,

0, 4, 8, 12, 16, 20, ................

Which is an AP,

Having the first term, $a_1 = 0$

And, the successive difference, d = 4,

Since, the sum of the n term of an AP,

$S_n = \frac{n}{2}[2a + (n-1)d]$

Hence the sum of 9 term of the above AP,

$S_9 = \frac{9}{2}[2\times 0 + (9-1)\times 4]$

$S_9 = \frac{9}{2}(0 + 8\times 4)$

$S_9 = \frac{9}{2}(32)$

$S_9 = \frac{288}{2}=144$

6 0

3 years ago

Help me please if you don’t mind

torisob [31]

Both diagram B and D

3 0

4 years ago

How many 3 letter codes are possible using a-j without repeats?

Dennis_Churaev [7]

There are 10 letters in the set {a, b, c, d, e, f, g, h, i, j} which is the pool of letters to choose from when making these three letter codes.

We have 10 choices for slot 1
Then 9 choices for slot 2. This is because we can't reuse the choice for slot 1
Then 8 choices for slot 3

Overall, there are 10*9*8 = 90*8 = 720 different permutations

Answer: 720

Note: you can use the nPr permutation formula with n = 10 and r = 3 to get the same answer

5 0

3 years ago