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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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Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar. A medical center o
viktelen [127]

Answer:

1) 0.1504

2) 0.432

Step-by-step explanation:

1) The given information are;

The proportion of the morning appointments that are with elderly patients = 60%

The number of patients in the appointments  = 10 patients

The proportion of the morning appointments that are with non-elderly patients = 100 - 60 = 40%

The binomial probability distribution is given as follows;

P(X = r) = \dbinom{n}{r}p^{r}\left (1-p  \right )^{n-r}

P(X = 0) = \dbinom{10}{0}0.6^{0}\left (1-0.6  \right )^{10} = 0.000105

P(X = 1) = \dbinom{10}{1}0.6^{1}\left (1-0.6  \right )^{9} = 0.0016

P(X = 2) = \dbinom{10}{2}0.6^{2}\left (1-0.6  \right )^{8}= 0.01062

P(X = 3) = \dbinom{10}{3}0.6^{3}\left (1-0.6  \right )^{7}= 0.0425

The probability that the first four patients are elderly is 0.000105 + 0.0016 + 0.1062 + 0.0425 = 0.1504

2) The probability that exactly 2 out of 3 morning patients are elderly patient is given as follows

P(X = 2) = \dbinom{3}{2}0.6^{2}\left (1-0.6  \right )^{1}= 0.432

8 0
3 years ago
3÷14 I ain't got enough money for tutoring so i have to struggle to find answers can someone help me please.​
MrMuchimi

Answer:

0.21428571428

Step-by-step explanation:

hope it helps

4 0
3 years ago
Compare the fractions. Use &lt;, &gt;, or =.<br> 6<br> 1<br> 7<br> 7
AURORKA [14]

Answer:

-6/7 < -1/7

because it is more than negative one by seven

8 0
3 years ago
The height of males approximates a normal distribution. The average height of the players on an NBA team is 6.6 feet with a stan
lara [203]
D) 4.5 Standard Deviations Above the Mean

All you have to do is add .2 to 6.6 until you reach 7.5

6.8
7.0
7.2
7.4

 Then you only need half of .2 to reach 7.5, so it's 4.5 standard deviations above the mean
6 0
3 years ago
PLEASE HELP GUYS RIGHT NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Margarita [4]

Answer:

Im on the same question so dont copy word for word

Step-by-step explanation:

The first error he made is that he didn't do the right steps in order to find the area of the two triangles. Instead he should have done 0.5 X 16 X 15 X 2= 240

Then the area for the three rectangles should be 16 X 8 + 17 x 8 + 17 X 8 = 400

If you add it all together, the surface area is actually 640 square meters.

7 0
3 years ago
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