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Korvikt [17]
4 years ago
13

Need help with #1 and #2 on this page. Thanks!

Mathematics
1 answer:
iogann1982 [59]4 years ago
7 0

Find the probability of obtaining 3 heads when flipping 4 coins

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A bag contains five white marbles and five black marbles. What is the probability of drawing a white marble, not replacing it, a
Lelu [443]

~ ANSWER=1/2 ~

Simple probability is found by counting all the results which fit requirements and dividing by all possible results.

To find probability of two results in a row, multiply chance of first result by chance of second result.

Since you are replacing the marble before the second draw, we don’t have to figure out the various changes in odds for the different possible first draws. It’s just that simple.

There are 5 white marbles

There are 4 red marbles

There are always 20 marbles in all

5/20*4/20=1/4*1/5=1/20 or 1/2

By coincidence, the same as the chance of drawing the white marble in one draw.

6 0
3 years ago
Mai runs around a track at a constant speed of 750 meters in 30 minutes . How many minutes per meter is that? And how many meter
Rudik [331]

Answer:

25 meters per minute

150 in 6 minutes

Step-by-step explanation:

5 0
3 years ago
Find the 12th term of the geometric sequence 4,8,16?
11Alexandr11 [23.1K]

Step-by-step explanation:

From the question. The first term is a which is 4. The common ratio is 8/4 = 2. n is 12 since we are looking for the 12th term.

The solution is attached below. The answer is 8192

7 0
3 years ago
What are the values of a, b, and c in the quadratic equation 0 = 5x – 4x4 – 2?
Aleonysh [2.5K]

Answer:3

Step-by-step explanation:

Hope it helps (。・//ε//・。)

6 0
4 years ago
Five cakes cost 3.50 how much do seven cakes cost
12345 [234]
$4.90 Each cake cost 0.70$ so 7x7=49 add the zero and move decimal one place to left
= 4.90$
8 0
3 years ago
Read 2 more answers
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