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Black_prince [1.1K]
3 years ago
7

A box contains 75 red and 25 green light bulbs. it is found that 20 bulbs in the box are defective, of which 2 are red. what is

the probability that a bulb selected randomly from the box is either a red bulb or a defective bulb?
0.82
0.93
0.73
0.95
Mathematics
1 answer:
Afina-wow [57]3 years ago
8 0

Answer:

15 bulbs are red.

Step-by-step explanation: Because 75 is 3 times as big as 25 so every 1 green light bulb 3 red light bulbs will be deflective.

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Mary and Jane have rectangular pools that are similar in shape. Mary’s pool dimensions are 2.1 times the corresponding dimension
Naddik [55]

Answer:

A

Step-by-step explanation:

Let's assume the first pool to have dimensions 3.0 by 2.0

The second pool being 2.1 times the first will have dimensions 6.3 * 4.2

The area of the first pool is 6.0 and that of the second is 26.46

making the area of the second pool 4.41 times that of the first.

7 0
4 years ago
Which of the following pairs is not correctly written in scientific notation?
Mnenie [13.5K]
The answer is:
__________________________________________________
 [B]:  "6,500 = 6.5 ² ".
__________________________________________________________
Note:  This is the correct answer choice because this chioce is INCORRECT;

Note: "6,500 = 6.5 * 1000 = 6.6 * 10³ " ;  note that:  "6.5 * 10² = 6.5 * 100 = 650.

Take note of this very answer chioce:   "650 = 65 * 100 = 6.5² * 10²  . " ;
__________________________________________________________
8 0
4 years ago
I need help pls I’ll mark you brain
Ket [755]

Answer:

I'm pretty sure it's B

Step-by-step explanation:

Stacy gets 2 cards each week, so you would multiply 2 cards by every week she volunteers. She started out with three cards, so therefore you would add 3.

5 0
3 years ago
Read 2 more answers
(5) I already know the answer but I'm pretty sure you guys would like some points so just trying to figure it out
leonid [27]

Answer:

c

Step-by-step explanation:

8 0
3 years ago
Pls help need it ASAP<br> :)
Elenna [48]

Answer:

x = 4

y = 13

Step-by-step explanation:

x + y = 17

y = 2x + 5

substitute for y:

x + (2x + 5) = 17

reduce:

3x + 5 = 17

subtract 5 from each side:

3x = 12

divide both sides by 3:

x = 4

y = 2(4) + 5

y = 13

6 0
3 years ago
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