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
Ilia_Sergeevich [38]
3 years ago
11

Question One:

Mathematics
1 answer:
Jobisdone [24]3 years ago
8 0

Probability that 2 of the 10 chargers will be defective =0.35

Number of ways of selecting 10 chargers from 20 chargers is 20C10

20C10 = 184756

Number of ways of selecting 10 chargers from 20 = 184756

Number of ways of selecting 2 defective chargers from 5 defective chargers = 5C2

5C2 = 10

Since 2 defective chargers have been chosen, there remains 8 to choose

Number of ways of selecting 8 good chargers from 15 remaining chargers = 15C8

Number of ways of selecting 8 good chargers from 15 remaining chargers = 6435

Probability that 2 of the 10 will be defective =

(10x6435)/184756

Probability that 2 of the 10 will be defective = 64350/184756

Probability that 2 of the 10 chargers will be defective =0.35

Learn more on probability here: brainly.com/question/24756209

You might be interested in
Two rectangles are similar. The length and width of the first rectangle is 4 m by 5 m. The second rectangle is similar by a scal
likoan [24]
<h3>Answer:  320 square meters</h3>

===================================================

Explanation:

The scale factor 4 means the dimensions of the second rectangle are 4 times larger.

The width of 4 meters bumps up to 4*4 = 16 meters.

The length of 5 meters becomes 4*5 = 20 meters.

So a 4 by 5 rectangle is similar to a 16 by 20 rectangle.

The area of the second rectangle is therefore 16*20 = 320 square meters.

---------------

As an alternative, you can compute the area of the 4 by 5 rectangle to get 4*5 = 20. Then multiply this with 4^2 = 16 to get 16*20 = 320.

The 4^2 = 16 multiplier is the result of squaring the scale factor.

So if you know the dimensions have been multiplied by 4, then the area has been multiplied by 16.

6 0
3 years ago
Help me with three questions a brainlist!
Naya [18.7K]

Answer:

Step-by-step explanation:

First question

1 solution

  • 6p-12= - 5p       Take 6p from both sides
  • -12 = -5p - 6p    Combine
  • -12 = - 11p           Divide by - 11
  • -12/-11 = p
  • 1.09 = p

Second Question

  • Infinitely many solutions.
  • 5p + 10 = 5p + 10
  • No matter what value you use for p, the right side of the equation always equals the left side.

Third question

  • y = 25 - 2x
  • x = 6
  • y = 25 - 2*6
  • y = 25 - 12
  • y = 13

There are 13 more stops to make.

6 0
2 years ago
Work out the perimiter of a semi circle with radius of 3 <br> Give your answer in term of pi
sweet [91]

Answer:

15.425 cm is it without terms of pie

Step-by-step explanation:

you need to put it into terms of pie

5 0
4 years ago
Read 2 more answers
marion wants to make 7/8 cup of salad for each person at her party. how many salad does she need to make for herself and four fr
BabaBlast [244]
To answer that think of this as how many groups of 7/8 cups of salad are needed.

If Marion is with four friends, she need salad for five total people.

She will need five groups of 7/8 cups of salad.

This is represented as 5 x 7/8.

5 x 7/8 = 4 3/8 cups of salad
6 0
3 years ago
Solve the following quadratic equation:<br> (3x – 5)2 = 4
Katarina [22]

Answer:

Step-by-step explanation:

It is mandatory (required) to use " ^ " for exponentiation:

(3x – 5)^2 = 4

Taking the square root of both sides, we get

3x - 5 = ±2, or

3x = 5 ±2, or

(a) 3x = 7 => x = 7/3, and

(b) 3x = 3, or x = 1

7 0
3 years ago
Other questions:
  • Nick has $7.00. Bagels cost $0.75 each and a small container of cream cheese costs $1.29. Write an inequality to find the number
    8·1 answer
  • Riley paid $2.99 for a 20-ounce container of soup. at that rate, what would riley pay for a 12-ounce container of the same soup?
    12·1 answer
  • At Brian’s Bookstore, 0.3 of the shelves hold mysteries, 25% of the shelves hold travel book and 7/20 of the shelves hold childr
    11·1 answer
  • Three fourths of a square is what percent
    11·1 answer
  • 3 less than the quotient of 18 and a number m
    14·1 answer
  • Las propiedades con los números reales
    13·1 answer
  • Find the perimeter of the figure​
    14·1 answer
  • Enter the value of (-1 1/4) - (-2/3) + (-3.5)
    9·2 answers
  • Guys help me with this question please. Due Now
    12·1 answer
  • 6. How much heat is lost cooling 25 grams of water from 90°C to 45°C?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!