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ExtremeBDS [4]
3 years ago
14

A couple would like to have two children, what the probability that they will not be the same sex

Mathematics
2 answers:
Papessa [141]3 years ago
7 0

Answer:

it depends but it is usually 50/50

Step-by-step explanation:

Assoli18 [71]3 years ago
4 0

es la probabilidad de tener tres hijos del mismo sexo

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You flip a fair coin until you see three tails in a row. What is the average number of headsthat you’ll see until gettingTTT?
Verdich [7]

Answer:

14

Step-by-step explanation:

From the given information:

suppose, Y is the number of times a coin is being flipped.

If the coin is flipped for the first time and we get H, then we have:

TTT = \dfrac{1}{2}(Y+1)

Afterward, if we get H, then we waste two times plus the probability of this event \dfrac{1}{4}.

Therefore, we have : \dfrac{1}{4}(Y+2)

Afterward, if we get H, then we waste three times plus the probability of this event \dfrac{1}{8}.

Therefore, we have : \dfrac{1}{8}(Y+3)

If we got T at the third time, then;

T = \dfrac{1}{8}(3)

Thus, average number of headsthat you’ll see until gettingTTT can be expressed as:

= \dfrac{1}{2}(Y+1)+ \dfrac{1}{4}(Y+2)+ \dfrac{1}{8}(Y+3)+ \dfrac{1}{8}(3)

= 14

7 0
3 years ago
Simon used 3 pears and 9 apples to make a fruit salad. What was the ratio of the number of pears to the number of apples in the
dlinn [17]

Answer:

Step-by-step explanation:

Ratio is an expression that shows the relationship between two items in terms of quantity. It shows how much of one item can be found in another.

Simon used 3 pears and 9 apples to make a fruit salad.

This is expressed in terms of quantity.

The ratio of the number of pears which simon used to the number of apples which simon used will be

Number of pears which simon used ÷ the number of apples which simon used.

The ratio is 3/9.

Simplifying further to its lowest term,

It becomes 1/3

This is done by dividing the numerator and denominator by 3

3 0
3 years ago
The model represents an equation.
madreJ [45]

Answer:

9/5

Step-by-step explanation:

solve the original equation for x

-4× + 3 = 1x +(-6)

-1x

-5x + 3 = -6

-3

-5x = -9

/-5

x = 9/5

CHECK

-4(9/5) + 3 = 1(9/5) +(-6)

-21/5 = -21/5

8 0
2 years ago
A sample of students at a university took a test that diagnosed their learning styles as active or reflective and also as visual
anastassius [24]

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Sample size, n = 39

Correlation Coefficient, r = 0.273

The hypothesis test to examine if there is a positive correlation :

H0 : ρ = 0

If there is a positive correlation, then ρ greater than 1

H0 : ρ > 1

The test statistic :

T = r / √(1 - r²)/(n - 2)

T = 0.273 / √(1 - 0.273²)/(39 - 2)

T = 0.273 / 0.1581541

T = 1.726

The Pvalue using a Pvalue calculator can be be obtained using df = n - 2, df = 39 - 2 = 37

The Pvalue = 0.0463

α= .10 and α= .05

At α= .10

Pvalue < α ; Hence, we reject H0 and conclude that a positive correlation exists

At α= 0.05 ;

Pvalue < α ; Hence, we reject H0 and conclude that a positive correlation exists

3 0
2 years ago
Ollie and 5 of his friends are going bowling. The cost for each of them is $12.30. How could you mentally go about finding the t
nika2105 [10]

Answer:

The answer is 73.8

Step-by-step explanation:

Just multiply 12.30 by 6 5 friends and olly

4 0
2 years ago
Read 2 more answers
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