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Phoenix [80]
3 years ago
5

A box in a supply room contains 21 compact fluorescent lightbulbs, of which 7 are rated 13-watt, 8 are rated 18-watt, and 6 are

rated 23-watt. Suppose that three of these bulbs are randomly selected. (Round your answers to three decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 23-watt
Mathematics
1 answer:
RoseWind [281]3 years ago
3 0

Answer:

The probability that exactly two of the selected bulbs are rated 23-watt is:

= 19%

Step-by-step explanation:

Number of fluorescent light bulbs in the box = 21

7/21 = 13-watt rated light bulbs

8/21 = 18-watt rated light bulbs

6/21 = 23-watt rated light bulbs

The probability of selected a 23-watt rated light bulb = 6/21 = 28.57%

Size of random selection of bulbs = 3

The probability that 2 out of these 3 bulbs are 23-watt rated light bulbs is:

= 6/21 * 2/3 = 19%

b) The probability of selecting 2 of the 3 bulbs from exactly the 23-watt rated bulbs is the probability of the 23-watt rated bulbs being selected given the chance of selecting 2/3.

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A triangle has 2 angles that each measure 19)
Goryan [66]

Answer:

isoceles

Step-by-step explanation:

because isosceles triangle have 2 sides with equal measurement and a same angle can be formed 1 or 3 times not 2 times.

4 0
3 years ago
(1/2 + 3/2)² + (2/3 x 1/2)³
docker41 [41]

The result of the mathematical expression given as follows: (1/2 + 3/2)² + (2/3 x 1/2)³ is 5.59 or 5⅔.

<h3>How to calculate mathematical expressions?</h3>

According to this question, the following expression is given to solve: (1/2 + 3/2)² + (2/3 x 1/2)³

First, we solve the both parts as follows:

  • ½ + 3/2 = 2
  • ⅔ + ½ = 1..16

Next, we solve the exponential function as follows:

= (2)² + (1.16)³

= 4 + 1.59

= 5.59 or 5⅔

Therefore, the result of the mathematical expression given as follows: (1/2 + 3/2)² + (2/3 x 1/2)³ is 5.59 or 5⅔.

Learn more about mathematical expression at: brainly.com/question/1703934

#SPJ1

5 0
2 years ago
Hello i hope you have a great day (:
Vlad [161]

Answer:

Ty, you too!

Step-by-step explanation:

Hope you have a good day.

7 0
2 years ago
Read 2 more answers
Which expression is equivalent to 8x-2x+x+x<br><br> a. 4x<br> b. 8x<br> c. 6x-2x<br> d. 10x-2y
Deffense [45]
B - 8x

To find this, combine like terms.

8x - 2x is 6x, then add the two x's on the side to bring it back to 8x.

Hope this helps!
4 0
3 years ago
Read 2 more answers
currently have 12 bottles of water on your shelf and want to keep an minimum level of 6 bottles at all times. you average sales
antoniya [11.8K]
<span>If you wish to have 6 or more bottles on the shelf at any given time, and you sell 2 a day, and you are open 7 days a week, then you'd want to start each week with at least 6 + (2·7)= 20 bottles. You have 12, so you'd need to order 8 more that for that next week.

Hope this helps.</span>
7 0
3 years ago
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