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Airida [17]
3 years ago
12

Find the probability of at least 2 girls in 8 births. assume that male and female births are equally likely and that the births

are independent events.
Mathematics
1 answer:
Afina-wow [57]3 years ago
6 0
At least two girls means either 2, 3 ... or 8 girls. 
Using the binomial law, we can write the probability in the form:
B(2,0.5)+B(3,05)+...+B(8,0.5)=0.0039(C_8^2+...+C_8^8)
Continue simplifying:
C_8^2+...+C_8^8=2^8-C_8^1=2^8-8=248\\\text{We deduce the probability of the event "at least two girls in birth ":}\\0.0039\times248=0.96\\\text{The above probability (0.96) means that the event is very likely}
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What is the value represented by the letter D on the box plot of data?
anyanavicka [17]
Hello!

The letter D is in the place for the upper quartile

To find this you have to find the median of the data

List the numbers from least to greatest

12, 18, 34, 55, 59, 68, 80, 80

The medians are 55 and 59

To get the median we take the average of these numbers

55 + 59 = 114

114 / 2 = 57

The median is 57

To find the upper quartile you find the median of the numbers higher than 57

List the numbers that are higher than 57 in the data

59, 68, 80, 80

Take the average of 68 and 80

68 + 80 = 148

148/2 = 74

The answer is 74

Hope this helps!
4 0
3 years ago
Is that the only ones I used
jek_recluse [69]

Answer:

yes

Step-by-step explanation:

7 0
3 years ago
A certain store sells small, medium, and large toy trucks in each of the colors red, blue,green, and yellow. The store has an eq
salantis [7]

Answer:

The probability that the truck she selects will have at least one of the two features that Ella Stella wants is 50%.

Step-by-step explanation:

Since a certain store sells small, medium, and large toy trucks in each of the colors red, blue, green, and yellow, and the store has an equal number of trucks of each possible color / size combination, if Stella wants a medium red truck and her mother will randomly select one of the trucks in the store, to determine what is the probability that the truck she selects will have at least one of the two features that Stella wants, the following calculation must be performed:

3 sizes

4 colors

4 x 3 = 12

4 midsize cars

3 red cars

1 medium red car

4 + 3 - 1 = 6

6/12 = 0.5

Therefore, the probability that the truck she selects will have at least one of the two features that Ella Stella wants is 50%.

6 0
3 years ago
Whats the answer two -x+4=1
blagie [28]
Its suposed to be-5+4=-1
8 0
3 years ago
Is y=1/2+2 linear? and how do you know just by looking at the equation?
saul85 [17]

Answer:

No, it is not

Linear functions are those whose graph is a straight line. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y.

5 0
3 years ago
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