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k0ka [10]
2 years ago
14

Mrs. Gomes found that 40% of students at her high school take chemistry. She randomly surveys 12 students. What is the probabili

ty that at most 4 students have taken chemistry? Round the answer to the nearest thousandth.
P (k successes) = Subscript n Baseline C Subscript k Baseline p Superscript k Baseline (1 minus p) Superscript n minus k. Subscript n Baseline C Subscript k Baseline = StartFraction n factorial Over (n minus k) factorial times k factorial EndFraction

READ ANSWERS !
0.008
0.438
0.562
0.665
Mathematics
1 answer:
Roman55 [17]2 years ago
5 0

Answer:

B

JUST TOOK THE UNIT TEST REVIEW

Learn more about the probability here;

brainly.com/question/24756209

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HELP I SUCK AT MATH!!!!AND IM FAILING STILL!!!!!
alukav5142 [94]

Answer:

y=x+1

Step-by-step explanation:

The slop and y-int are 1, just like on the graph

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3 years ago
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Ivenika [448]

Answer:

{x}^{2}  -  {y}^{2}  + 4y - 4 \\  \\  {x}^{2}  - ( {y}^{2} .2.y.y +  {2}^{2} ) \\  \\  {x}^{2}  - (y - 2) {}^{2}  \\  \\ (x + y - 2)(x - y + 2)

4 0
3 years ago
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A high street store advertises 35% reduction on all clothing items. A dress costs £85 before the reduction. How much does it cos
Temka [501]

Answer:

£55.25

Step-by-step explanation:

Cost after reduction

=Cost before sale - Reduction in cost

= 85 - 35% of 85

= 85 - 0.35*85

= 85 - 29.75

= £55.25

3 0
3 years ago
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What is the area of a regular nonagon (9 sides) with side length of 15 cm and apothem of 20.6 cm? Round the answer to the neares
Triss [41]
We know that

<span>The nine radii of a regular Nonagon divides into 9 congruent isosceles triangles
</span>therefore
[the area of <span>a regular nonagon]=9*[area of isosceles triangle]

</span>[area of isosceles triangle]=b*h/2------> 15*20.6/2----> 154.5 cm²
so
[the area of a regular nonagon]=9*[154.5]------> 1390.5 cm²

the answer is
1390.5 cm²

5 0
3 years ago
The weekly salaries (in dollars) for
kompoz [17]

Answer:

a) Median stays the same

b) Mean is decreased by $9

Step-by-step explanation:

The median is the number or the average of the two numbers that is in the middle of a sorted distribution of numbers,

Here the median number will be the 5th number counting from left or right from the sorted list of numbers. Therefor is is 891.

When 1027 is changed to 946 it will fall between 938 and 1002. So updated sorted list of numbers will now look like,

679, 715, 799, 844, 891, 917, 938, 946, 1002

Here also median will be the 5th number which will be equal to 891.

Therefore, , median will not change.

Mean is the value we get by taking the total value of the salaries and divide it by the number of employees.

In the initial case,

Mean =\frac{679+715+799+844+891+917+938+1002+1027}{9} =868

When the salary is changed from $1027 to $946,

Mean=\frac{679+715+799+844+891+917+938+1002+946}{9} =859

Therefor we can see that Mean has decreased by $9.


8 0
3 years ago
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