Answer:
0.0256
Step-by-step explanation:
Assuming a binomial model, with probability of success (getting a red marble) p = 0.20. The probability of obtaining 'k' successes in 'n' trials is:
For k = 3 red marbles in n = 4 trials:
The probability that the child gets exactly three red marbles is 0.0256.
Answer:
Maria answers <u>85%</u> of the questions correctly
Step-by-step explanation:
Maria had a test with 20 questions
if 17 are correct,
20 questions : 100%
17 questions : ?%
she was 85% right<em>
</em>
<em />
<em>hope this helps</em><em> :)</em>
-8x + y = 6
in the first equation, isolate y and then it becomes...
y = 6 + 8x
use this to replace the y in the second equation.
7x - 1y = -4
let y = 6 + 8x
7x - (6 + 8x) = -4
7x - 6 - 8x = -4
-x - 6 = -4
x + 6 = 4
x = 4 - 6
x = -2
now use this x = -2 into the equation with y.
y = 6 + 8x
y = 6 + 8(-2)
y = 6 -16
y = -10
Therefore, x = -2 and y = -10
Follow me if you want to know more. :)
Answer:
Can you be more specific of what you are looking for please? i just entered it into the calc but what are you looking for as the answer?
