This problem is an example of binomial probability. In
this case, we can use the formula:
P (r) = [n! / (n – r)! r!] p^r q^(n-r)
where,
n = total number of babies = 11
r = selected number of babies
p = success of being a girl = 0.5
q = 1 – p = 1 – 0.5 = 0.5
Since we are asked to find for the P (r less than or
equal 9), therefore:
P (r less than or equal 9) = 1 – [P(11) + P(10)]
P(11) = [11! / (11 – 11)! 11!] 0.5^11 * 0.5^(11-11) = 4.8828
* 10^-4
P(10) = [11! / (11 – 10)! 10!] 0.5^10 * 0.5^(11-10) = 5.3711
* 10^-3
Therefore:
P (r less than or equal 9) = 1 – [4.8828 * 10^-4 + 5.3711
* 10^-3]
P (r less than or equal 9) = 0.994
The closest answer is letter C:
C = 509/512 = 0.994
Answer:
Step-by-step explanation:
just put the number on top and what divides it on the bottom
Answer:
4:20
Step-by-step explanation:
The answer should be 4:20
1. Total the number of CD's
2. 4:20 are country
3. Therefore out of 20 CD's there's a probability that 4 will be chosen.
Hope This Helps <3
Answer:
The graph is shown below. The points for the graph are and .
Step-by-step explanation:
Given:
The function is
Values of are -2 and 2.
Evaluate the value of the function at and .
Therefore, the points on the graph are and .
Now, we plot the points on a graph and join the line passing through the two points.
Answer: It is D
Step-by-step explanation: