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galben [10]
2 years ago
5

Cadie is going to toss three coins simultaneously. What is the probability that exactly two of the coins will land on heads?

Mathematics
1 answer:
Contact [7]2 years ago
4 0

For each coin, there are <u>2 outcomes</u>, heads (H) or tails (T), so for the <u>3 coins</u>, the number of outcomes are:

2 x 2 x 2 = <u>8 outcomes:</u>

HHH / HHT / HTH / THH / TTT / TTH / THT / HTT

Out of all these outcomes, there are <u>3 ways</u>, we get exactly 2 Heads:

HHT / HTH / THH

So, the probability of exactly 2 coins landing on Heads is 3/8, or 0.375

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Ebony walked at a rate of 3 1/2 miles per hour for 1 1/3 hours. how far did she walk.
Pachacha [2.7K]
About 4.65 miles. Multiply 3 1/2 (3.5) by 1 1/3 (1.33) and thats how you get the answer
7 0
3 years ago
Jean’s salary last month was $3200. Because of worse beneficial result of her company, this month her salary decreased to $2720.
vesna_86 [32]

Answer:

15%.

Step-by-step explanation:

3200 x .15 = 480

3200 - 480 = 2720

Feel free to let me know if you need more help! :)

5 0
3 years ago
Can someone please answer this for me? thanks to whoever can &lt;3 (btw i think its 79)
Harman [31]
There are always 180° in a triangle, so to work out the missing angle, you add up the angles you have and do 180 - that answer.

So it would be: 

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6 0
3 years ago
Read 2 more answers
The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oa
Rashid [163]

Answer:

5 classes.

Step-by-step explanation:

You can use the 2^k rule to determine the number of classes for a frequency distribution.

The 2^k rule says that 2^k\geq n where

k is the number of classes

n is the number of the data points

We know that the number of data points is n = 20.

Next, we start searching for k so that we can get a number 2 to the k that is larger that the number of data points.

2^4=16\\2^5=32

This suggests that you should use 5 classes.

8 0
3 years ago
A box of multi-color paper clips contains 25 red clips, 15 blue clips, 15 green clips and 20 pink clips. If Roy
kolbaska11 [484]

Answer:

8/15

Step-by-step explanation:

Probability is the ratio of the number of possible outcome to the number of total outcome. The probability that an event will happen added to the probability that the event will not happen gives 1. In other words, the outcome of a probability cannot exceed 1.

The probability that an event a will happen or that another independent event  b will happen is the sum of the probability that a will happen to the probability that b will happen.

Given that there are 25 red clips, 15 blue clips, 15 green clips and 20 pink clips,

total number of clips available

= 25 + 15 + 15 + 20

= 75

probability of picking a

red paper clip = 25/75

blue paper clip = 15/75

Probability of selecting red or  blue paper clip

= 25/75 + 15/75

= 40/75

= 8/15

3 0
3 years ago
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