Assume that a researcher randomly selects 14 newborn babies and count the number of girls, X. The probabilities corresponding to the 14 possible values of X are summarized in the given table. Answer the questions using the table. Find the probability of selecting exactly 3 girls.
A. 0.022
B. 0.122
C. 0.001
D. 0.061
 👍
 👎
 👁
 ℹ️
 🚩
1 answer

No idea what "tables" you are talking about, don't need any
prob(girl) = 1/2
prob(not a girl) = 11/2 =1/2
prob(exactly 3 girls in 14)
= C(14,3) (1/2)^3 (1/2)^11
= 364(1/2)^14 = appr. .0222 👍
 👎
 ℹ️
 🚩
answered by mathhelper
Answer this Question
Related Questions

help plz? 2 questions
1. What does it mean to calculate frequencies within a dataset? to count the number of times a dataset is used by a student to calculate the product of two variables to make a third variable to count the number of cases that fall into different subgroups
 asked by Princess Anna
 25,158 views

math
In a family with 4 children what is the probability of having 1 boy and then 3 girls, in that order? (Exclude multiple births and assume all outcomes are equally likely). In a family with 4 children, what is the probability of having 1 boy and 3 girls, in
 asked by john
 19,235 views

English
Which of these sentences uses pronouns correctly? ABoth the girls had their own bicycle B All of the girls had her own bicycle C Each of the girls has their own bicycle D Few of the girls had her own bicycle. Is it C?
 asked by Sebastian
 1,851 views

Science
A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment? A. Nitrogen (N) B. Sulfur (S) C. Arsenic (As) D. Silicon (Si) I choose Arsenic,
 asked by Baby_Banana
 12,184 views

biology
A couple has four children. What is the probability that there will be 2 boys and 2 girls? Assume that no outside forces influence the births.
 asked by katt0109
 3,579 views

Economics (37)
According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .7 hours and that the probability distribution is normal. a. What is the probability that a randomly selected person
 asked by Mia
 4,510 views

Geometry
When Ms Shreve randomly selects a student in her class, she has 1/3 probability of selecting a boy. A: If her class has 36 students, how many boys are in her class? B: if there are 11 boys in her class, how many girls are in her class? C: what is the
 asked by Anonymous
 2,382 views

Economics (36)
For borrowers with good credit scores, the mean debt for revolving and installment accounts is $15,015 (BusinessWeek, March 20, 2006). Assume the standard deviation is $3,730 and that debt amounts are normally distributed. a. What is the probability that
 asked by Mia
 5,204 views

mathematics
Allyson and Adrian have decided to connect their ankles with a bungee cord; one end is tied to each person's ankle. The cord is 30 feet long, but can stretch up to 90 feet. They both start from the same location. Allyson moves 20 ft/sec and Adrian moves 12
 asked by Matt
 399 views

math
there are 32 boys and 24 girls. what re the various number of teams that can be made that would have the same number of boys and girls on each team?
 asked by john
 847 views

Statistics/Probability
Assume that women’s heights are normally distributed with a mean given by μ = 63.4 in, and a standard deviation given by σ = 2.3 in. (a) If 1 woman is randomly selected, find the probability that her height is less than 64 in. (b) If 43 women are
 asked by slomomo
 2,484 views

maths
if u were to count one number per second and counted 7 hours per day ,how long would it take u to count to a billion
 asked by madhuri
 287 views

Math
12 girls and 20 boys signed up to play n a basketball tournament. Each team needs to have an equal number of girls and boys. What is the greatest number of teams possible
 asked by Kallie
 981 views

math
A box contains 4 red pencils, 3 blue pencils, and 3 yellow pencils. What is the probability that a student randomly selects a blue pencil, keeps it, then a second student randomly selects a yellow pencil? A. 1/10 B. 3/10 C. 6/10 D. 9/10
 asked by andrea
 1,517 views

math
For this problem, assume the balls in the box are numbered 1 through 9, and that an experiment consists of randomly selecting 3 balls one after another without replacement. What probability should be assigned to the event that at least one ball has an odd
 asked by Laura
 2,031 views

Math
The music teacher would like to have the same number of girls and of boys in the chorus. She finds that 5/8 of the chorus are girls but that if she can get 10 more boys, the chorus will have the same number of boys as of girls. (a) How many students are in
 asked by Megan
 3,784 views

maths
there are b boys in the class.this is 3 more than 4 times the number of girls. how many girls are there in the class.?
 asked by esha
 1,164 views

math/algebra
The simplified ratio of boys to girls in a group is 5 : 3 There are 80 more boys than girls. How many girls are there? help pls ;(
 asked by lilly
 1,023 views

statistics
An IRS auditor randomly selects 3 tax returns from 58 returns of which 8 contain errors. What is the probability that she selects none of those containing errors?
 asked by Kerri
 9,413 views

mathematics
A baby otter was born 3/4 of a month early. At birth, its weight was 7/8 kilograms, which is 9/10 kilogram less than the average weight of newborn otter in the aquarium. What is the average weight of a newborn otter?
 asked by lily
 1,150 views
Still need help?
You can ask a new question or browse existing questions.