1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Genrish500 [490]
2 years ago
9

A shipment of 12 microwave ovens contains three defective units. A vending company has ordered four units, and because each has

identical packaging, the selection will be random. What is the probability that (a) all four units are good, (b) exactly two units are good, and (c) at least two units are good?
Mathematics
1 answer:
statuscvo [17]2 years ago
8 0

Answer:a) 54/55

b) 100/110

c) 99/110

Step-by-step explanation:

a)Probability of ordering 4= 9/12×3/11×2/10×1/9 = 54/11880

Probability of 4 good units= 4 × 54/11880

= 216/11880

1/55

1-(1/55) = 54/55

b)Probability of 2 good units= 2 × 54/(11880)

= 108/11880

= 1/110

1- (1/110)= 100/110

c) Probability of exactly 2 units not good= 1 -(100/110) =99/110

You might be interested in
2. What is the slope of the line pictured? X​
saul85 [17]

Answer:

y= -2x+2

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Which sequence of transformations performed on shape I confirms the congruence of shape II and shape I?
vampirchik [111]

Answer:

Option D. a 180° rotation about the origin and then a translation left 8 units.

Step-by-step explanation:

See the attached figure_1

From the graph: Point A'(-12,-6) is the image of point A(4,6)

We will check which sequence of transformations is true:

A. a reflection across the y-axis and then a translation down 16 units

A(4,6) ⇒(-4,6)⇒(-4,-10)   <u> (Wrong sequence)</u>

B. a 90° counterclockwise rotation about the origin and then a translation down 8 units

A(4,6) ⇒(-6,4)⇒(-6,-4)    <u>(Wrong sequence)</u>

C. a 90° clockwise rotation about the origin and then a translation left 16 units

A(4,6) ⇒(6,-4)⇒(-10,-4)    <u>(Wrong sequence)</u>

D. a 180° rotation about the origin and then a translation left 8 units

A(4,6) ⇒(-4,-6)⇒(-12,-6)A'   <u>(True sequence)</u>

<u></u>

Note: the rules is the attached figure_2

4 0
3 years ago
Read 2 more answers
SURDS
aev [14]
1) √3 √7 = √21
2) √5 √245 = √5 √5 * 49 = √5 * 7√5 = 7 √5 * 5 = 7 √25 = 7 * 5 = 35
3) √77 ÷ √11 = as is. can't be simplified.
4) (√59)² = 59 ; the square root was cancelled by squared.
5) 3√6 x 8√7 = 3 * 8 √6 * 7 = 24 √42
6) 5√3 x 6 √3 = 5 * 6 √3 * 3 = 30 √9 = 30 * 3 = 90
7) 40√30 ÷ 5√3 = (40 / 5) * (√30 /√3) = 8 * ((√3 *10) / √3) = 8 √10
8) (6√5)² = 6² * √5² = 36 * 5 = 180
4 0
2 years ago
mo's farm sold a total of 165 pounds of Apples and peaches. she sold Apple for $1.75 per pound and peaches for $2.50 per pound.
Ilia_Sergeevich [38]
She sold 135 peaches, because if you multiply 2.50 eith 135, you'd get 337.5, the 0 can be added or not.
6 0
3 years ago
Read 2 more answers
Given: m∠V=103°, m∠VRT=71°, RS ∥ VU Find: m∠TRS, m∠U
lawyer [7]

Answer:

m∠U = 103° and m∠TRS = 6°

Step-by-step explanation:

In the given circle O,

Since, RS║VU, and VR is a transverse,

Therefor, m∠V + m∠R = 180° [Consecutive interior angles]

m∠R + 103° = 180° [m∠R = 103° given]

m∠R = 180° - 103°

m∠R = 77°

Since m∠R = m∠VRT + m∠TRS

77° = 71° + m∠TRS

m∠TRS = 77° - 71° = 6°

Quadrilateral RTUV is a cyclic quadrilateral.

Therefore, m∠U + m∠R = 180°

m∠U + 77° = 180°

m∠U = 180° - 77° = 103°

5 0
3 years ago
Other questions:
  • The present age of Joyal’s mother is three times the present age of joyal. After 5 years their ages will add up to 66. Find thei
    11·1 answer
  • fred has 10 coins in a book bag. He has 4 quarters, 1 penny, and 5 dimes. If Fred reaches into his book bag and draws a coin wit
    14·2 answers
  • 120 is the same as 394 fewer than Z
    12·2 answers
  • Which of the following is an arithmetic sequence 1,5,25,625 -4,-7,-10,-13,16 2,5,10,15 3,-3,3,-3,3
    9·1 answer
  • 2 (x - 1/2) = 8+2x <br>How many solution does this equation have​
    9·1 answer
  • .24 repeating as a fraction but the 4 is the only thing repeating
    5·1 answer
  • A cooler contains 12 bottles of apple juice and 18 bottles of orange juice. You reach into the cooler without looking and pull o
    8·1 answer
  • A square tile with side 30 cm is cut into equal area triangles, whose base is 10 cm and height is 30 cm. Find the number of tria
    5·1 answer
  • PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP
    7·2 answers
  • This is part of my other question
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!