There are 9 girls and 11 boys in a class, and two students will be chosen one after another. Find the probability that both are boys.

Answers

Answer 1
Answer:

Answer:

11/20

Step-by-step explanation:

total=20

11=boys

9=girls

p(b)=11/20


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The dot plot show the number of emails aaron sent his cousin each week

Answers

Answer:

The answer is 2 i think

Step-by-step explanation:

I think thats where the gap is

The answer is 225 im just guessing

Convert 1010101001 from binary to hexadecimal.

Answers

Answer:

2A9

Step-by-step explanation:

At the "cloth for you" shop, you can buy a top for £10.00 and a Bermuda trouser for £12.00. Due to a sensational sell, there is a 20% discount on all tops. If you buy one top and two Bermuda trousers, how much money do you spend in total?

Answers

Answer:

£32 in total for the top and two trousers

Step-by-step explanation:

The price for a top In the "cloth for you" shop= £10

The price for a bermuda trouser In the "cloth for you" shop= £12

There is a 20% discount on tops

The price If I bought one top and would trouser will be

(10-(0.2*10)) for the top

2(12) for the trouser

Total= (10-(0.2*10))+ 2(12)

Total = 10-2+24

Total = £32

So I spent £32 in total for the top and two trousers

Question Two :A discrete random variable X has negative binomial distribution,
with 6 successes required each with probability of success 0.4
Determine the value of ...
a) ...E(X).
b) ... Var( X)
c) ... P ( X = 12).

Answers

Using the negative binomial distribution, it is found that:

a) E(X) = 15

b) Var(X) = 6.67

c) P(X = 12) = 0.0883

Negative binomial distribution:

It is the number of trials until q successes of a binomial variable, with p probability of success.

The expected value is:

E(X) = (q)/(p)

The variance is:

Var(X) = (pq)/((1 - p)^2)

The probability mass function is:

P(X = x) = C_(x+q-1,q-1)(1 - p)^xp^q

C_(n,x) = (n!)/(x!(n-x)!)

In this problem, the parameters are: q = 6, p = 0.4.

Item a:

E(X) = (6)/(0.4) = 15

Item b:

Var(X) = (6(0.4))/((1 - 0.4)^2) = 6.67

Item c:

P(X = 12) = C_(17,5)(0.6)^12(0.4)^6 = 0.0883

To learn more about the negative binomial distribution, you can take a look at brainly.com/question/15246027

Helpi need this in the next 30 minutes!

Answers

Answer:

answer: c

Step-by-step explanation:

the experiment land 4 of 15 times on Q making the experiment 4/15 and the chances of landing on Q is 1/5

According to the graph, what is the value of the constant in the equationbelow?
25+
(3.25)
Height
Constant
Width
20 +
15
(5, 15)
Height
10
(15,5)
(25,3)
10
15
20
25
Width
O A. 5
B. 100
O c. 10
O D. 75

Answers

The value of the constant in the equation below is 100. So, the correct option is (C).

What is Height?

Height also known as elevation is defined as the vertical distance either between the top and bottom of something or between a base and something above it. It refers to something measured vertically high or low.

Height is body measurement usually measured in feet (feet) + inch (in) and centimeter (cm) where these are length measurements, so the SI unit will be meter.

Height equation: H= C/W

where, H is the height, C is the constant and W is the width.

We choose a point given in the graphic, I will choose (4,25), which means that when W=4  and H=25 . We use this to find the constant. So

25=C/3

C= 100

Thus, the value of the constant in the equation below is 100. So, the correct option is (C).

Learn more about Constant, here:

brainly.com/question/9994821

#SPJ5

Answer:The Answer is C

Step-by-step explanation: