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Radda [10]
3 years ago
8

Plzz helpp plzz

Mathematics
1 answer:
Svetach [21]3 years ago
3 0

Step-by-step explanation:

k = 72

x= -81

..............

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As part of quality-control program, 3 light bulbs from each bath of 100 are tested. In how many ways can this test batch be chos
hichkok12 [17]

Answer:

<h3>By 161700 ways this test batch can be chosen.</h3>

Step-by-step explanation:

We are given that total number of bulbs are = 100.

Number of bulbs are tested = 3.

Please note, when order it not important, we apply combination.

Choosing 3 bulbs out of 100 don't need any specific order.

Therefore, applying combination formula for choosing 3 bulbs out of 100 bulbs.

^nCr = \frac{n!}{(n-r)!r!} read as r out of n.

Plugging n=100 and r=3 in above formula, we get

^100C3 = \frac{100!}{(100-3)!3!}

Expanding 100! upto 97!, we get

=\frac{100\times 99\times 98\times 97!}{97!3!}

Crossing out common 97! from top and bottom, we get

=\frac{100\times 99\times 98}{3!}

Expanding 3!, we get

=\frac{100\times 99\times 98}{3\times 2\times 1}

= 100 × 33  × 49

= 161700 ways.

<h3>Therefore,  by 161700 ways this test batch can be chosen.</h3>
3 0
3 years ago
What is 0.24% of 77? Round to the nearest hundredth
Kruka [31]

Answer:

.18

Step-by-step explanation:

77 x .24% (0.0024) = .1848

Round to the nearest hundredth...

.18!

6 0
2 years ago
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melisa1 [442]
Answer is 34 ft squared
3 0
3 years ago
What is the value of 10×+z=150<br>​
JulijaS [17]

Answer:

<h2><u><em>15</em></u></h2>

Step-by-step explanation:

what is the value of 10×+z=150

10× (+z) = 150

10 × z = 150

z = 150 : 10

z = 15

-----------------------

check

10 × 15 = 150

the answer is good

8 0
2 years ago
Read 2 more answers
Can someone help me with this please it would be a big help
Anuta_ua [19.1K]
Answer in order

----------
answer
A. -4.6 - (0.4 + 7.2)

----------------
answer
B. -10 + (-90) + (-40)

--------
answer

associate property of addition

------------------

answer
Commutative <span>Property
</span>
--------------------

answer
-147
7 0
2 years ago
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