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
Taya2010 [7]
3 years ago
12

A lot of 100 semiconductor chips contains 15 that are defective. three chips are selected at random from the lot without replace

ment. what is the probability that the third chip is defective?
Mathematics
1 answer:
Alex787 [66]3 years ago
5 0
D=event that chip selected is defective
d=event that chip selected is NOT defective

Four possible scenarios for the first two selections:
P(DDD)=15/100*14/99*13/98=13/4620
P(DdD)=15/100*85/99*14/98=17/924
P(dDD)=85/100*15/99*14/99=17/924
P(ddD)=85/100*84/99*15/98=17/154

Probability of third selection being defective is the sum of all cases,
P(XXD)=P(DDD)+P(DdD)+P(dDD)+P(ddD)
=3/20


You might be interested in
Graph 5x+y=2 and 5x-y=4
Andru [333]

Answer:

What do you mean

Step-by-step explanation:


7 0
3 years ago
Ken has a pole that is 26 inches long. He wishes to cut it into two pieces so that one piece will be 8 inches
bazaltina [42]

Answer:

im too immature for this lol...9. the answer is 9 inches

Step-by-step explanation:

9+9=18

18+8=26

4 0
1 year ago
You might need: Calculator
Naily [24]

Answer:

Which studio charges more for each additional charge? B

Raj wants to take 8 classes each month. Which studio is cheaper for him? A

Step-by-step explanation:

Studio one has no additional charge.

Studio two 8 classes would be 100 dollars more than the 70dollar flat fee of studio one.

6 0
3 years ago
Dan's business loses $9 each day. Which equation would be used to show how much money Dan's business has lost in a week? A. -9 ×
Lady bird [3.3K]

Answer:

C. \: 9 \times 7

8 0
3 years ago
How can you use proportional reasoning to solve problems involving percent
Oksana_A [137]
Example A, Step 1: Write a comparing the percent to the ratio of part to whole. ex- ?/25 = 28/100 *Notice that 25 is a factor of 100* Step 2: Find the multiplication factor. ex- ?*4 = 28 and 25*4 = 100 *Since 25*4 = 100, find what number times 4 equals 28* Step 3: Find the numerator. ex- 7/25 = 28/100 *Since 4*7 = 28, 28% of 25 = 7 Example B, Step 1: Write the percent as a fraction. ex-35% of 60 = 35/100 of 60 Step 2: Multiply. ex- 35/100 of 60 = 35/100x60=2100/100=21 *Simplify* Example C, Step 1: Write the percent as a decimal. ex- 5% = 5/100 = 0.05 Step 2: Multiply. ex- 180 * 0.05 = 9, 5% of 180 is 9.
3 0
3 years ago
Other questions:
  • How much alfalfa does Helmut need to add to 30L of ostrich pellets to make a feed mix that is 40% alfalfa by volume?
    11·1 answer
  • The scale of a model train is 4 inches to 30 feet. One of the cars of the model train is 6 inches long. What is the length, in f
    12·1 answer
  • Use the formula F = 1.8C + 32 to convert -10C into Fahrenheit
    5·2 answers
  • If a frog can move 3/5 of a mile every hour than how many hours would it take to go 6 miles?
    6·2 answers
  • Triangle XYZ has vertices X(-3,-2),Y(-1,0), and Z(1,-6). Find the vertices of triangle XYZ after a translation of 6 units to the
    14·1 answer
  • What can you do when the unit prices for two comparable items are listed using different units of measure? a. The secondary unit
    5·1 answer
  • This is the answer to a problem or an equation.<br><br> Example: For 3x+6=27, this is x=7
    7·1 answer
  • Whats 222+444 0____0
    15·2 answers
  • What is the answer to <br>Graph y=−x−2.
    7·1 answer
  • Which expression is equivalent to 4y (y + 3) + 4 ( y − 3)? A 5y2 + 26y – 12 B 5y2 + 2y – 12 C 12y2 + 12y – 24 D 12y2 + 2y – 24
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!