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galina1969 [7]
3 years ago
5

A box contains 30 radio chips of which 10 are defective. If 7 chips are picked at random out of the box randomly, what is the pr

obability that at least 8 are defective?
Needs to show all work.
Mathematics
2 answers:
babunello [35]3 years ago
8 0

Answer the chace is 50%

Step-by-step explanation:

because if you  defined it then simplify it u get 50

Tanzania [10]3 years ago
6 0

Answer my question first

if one ratio is given find all other find sin30+cos30?

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Help please with these questions
sergeinik [125]

Answer:

1. There is a <u><em>1/5</em></u> chance you will get a blue one from both bags.

2. There is a <u><em>3/32</em></u> chance you will get a 1 and then a 2.

3. There is a <u><em>5/12</em></u> chance of rolling a factor of 12 and then an odd number.

Step-by-step explanation:

<u><em>Question 1</em></u>

Add all the marbles together.

3 + 2 = 5

4 + 2 = 6

Make a fraction.

blue/all

Use it on the numbers.

3/5

2/6

Multiply them together.

6/30

Simplify.

1/5

There is a <u><em>1/5</em></u> chance you will get a blue one from both bags.

<u><em>Question 2</em></u>

Add all the numbers together.

There are 8.

Make the two crucial fractions.

ones/all

twos/all

Use them.

3/8

2/8

Multiply them together.

6/64

Simplify.

3/32

There is a <u><em>3/32</em></u> chance you will get a 1 and then a 2.

<u><em>Question 3</em></u>

Find the factors of 12.

1, 2, 3, 4, 6

Make a fraction.

factors/all

Use the fraction.

5/6

Find the odd numbers.

1, 3, 5

Make a fraction.

odd/all

Use the fraction.

3/6

Multiply them together.

15/36

Simplify.

5/12

There is a <u><em>5/12</em></u> chance of rolling a factor of 12 and then an odd number.

8 0
3 years ago
Find the are of the shaded region
laila [671]
Answer.: shaded region = 16 unit^2

Explanation:

Shaded region = 4 x 4 = 16 unit^2
7 0
3 years ago
What is 5 3/8- 3 7/8
grigory [225]

Conversion: 5 3/8 = 5 · 8 + 3

8

= 43

8

Conversion: 3 7/8 = 3 · 8 + 7

8

= 31

8

Subtract: 43

8

- 31

8

= 43 - 31

8

= 12

8

= 3

2


6 0
3 years ago
Read 2 more answers
Please Help. &gt;.&lt;<br><br> Is This True Or False?
Viktor [21]

Answer:

False

Step-by-step explanation

I believe it's false

6 0
3 years ago
Read 2 more answers
The slope of a line that passes through points (5, 14) and (-4, y) is 4/9. What is the value of y?​
Monica [59]

Answer:

slope=m=4/9

(x',y')=(5,14)

(x",y")=(-4,y)

we have

m=(y"-y')/(x"-x')

4/9=(-4-5)/(y-14)

4y-56=-81

4y=-81+56

y=-25/4

3 0
3 years ago
Read 2 more answers
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