The probability is P = 0.004, so the correct option is D.
<h3 /><h3>How to find the probability?</h3>
We want to find the probability that 4 students lie on these 30% subgroup.
We know that there are 30 students, the 30% of 30 is:
x = (30%/100%)*30 = 9
So 9 out of 30 students prefer the tests to be on Mondays.
The probability that the first randomly selected kid wants the test to be on Monday is:
p= 9/30
For the next kid, the probability is:
p'= 8/29 (because one kid was already selected).
For the next one:
p'' =7/28
For the final one:
p''' =6/27
The joint probability is the product of these 4:
P = (9/30)*(8/29)*(7/28)*(6/27) = 0.004
So the correct option is D.
If you want to learn more about probability:
brainly.com/question/25870256
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Answer:
-2
Step-by-step explanation:
Substitute -8 in place of x and you get (-8+2)/3 or -6/3 which is -2
Answer:
Assuming that the die has sides that are equal and that the sides are numbered 1 to 666 (since there are 666 sides), then the probability of rolling a 555 and flip a heads is 1/1,332.
Step-by-step explanation:
Probability of flipping a heads: 1/2
Probability of rolling a 555: 1/666
Multiply the two probabilities to get your probability for rolling both.
1/2 times 1/665 is 1/1,332.
Answer:
30 yd²
Step-by-step explanation:
rectangle area = 6 x 4 = 24
triangle area = 1/2 x 3 x 4 = 6
24 + 6 = 30 yd²
also could be figured this way:
area = 1/2(b1 + b2)(h)
1/2(6 + 9)(4) = 30 yd²
