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Aneli [31]
1 year ago
5

The expected value for getting heads, on 30 coin tosses, is 15. The

Mathematics
1 answer:
8090 [49]1 year ago
4 0

The expected value of the sum of these events will be 2 / 3.

<h3>What is probability?</h3>

Probability is defined as the ratio of the number of favourable outcomes to the total number of outcomes in other words the probability is the number that shows the happening of the event.

Probability = Number of favourable outcomes / Number of sample

Given that the expected value for getting heads, on 30 coin tosses, is 15. The expected value for rolling a 1, after 30 die rolls is 5.

The probability of the sum will be calculated as,

P = ( 15 / 30 ) + ( 5 / 30 )

P =  ( 20 / 30 )

P = 2 / 3

Therefore, the expected value of the sum of these events will be 2 / 3.

To know more about probability follow

brainly.com/question/24756209

#SPJ1

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Please help me
Stels [109]

Answer:

Step-by-step explanation:

Rational number between 2 and 3  = \frac{2+3}{2}=\frac{5}{2}

2 < \frac{5}{2} < 3

Now, find the rational number between 2 and 5/2

Rational number between 2 and 5/2 = \frac{1}{2}(2 + \frac{5}{2})=\frac{1}{2}*(\frac{2*2}{1*2}+\frac{5}{2})=\frac{1}{2}(\frac{4}{2}+\frac{5}{2})=\frac{1}{2}*\frac{9}{2}=\frac{9}{4}

2 < \frac{9}{4} < \frac{5}{2} < 3

Rational number between 5/2 and 3 is

= \frac{1}{2}(\frac{5}{2}+3)=\frac{1}{2}(\frac{5}{2}+\frac{3*2}{1*2})=\frac{1}{2}*(\frac{5}{2}+\frac{6}{2})=\frac{1}{2}*\frac{11}{2}=\frac{11}{4}

Rational numbers between 2 and 3 are

9/4 , 5/2 , 11/4

4 0
3 years ago
Plz help....................
Dominik [7]

Answer:

I think it is 10x +40

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
I will give you brianly look i want to know a+b=??
mr Goodwill [35]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
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Pentagon RSTUV is circumscribed about a circle. What is the value of x if RS = 10, ST = 13, TU = 11, UV = 12, and VR = 12?
Kobotan [32]

Answer:

Step-by-step explanation:

The value of x is 7 ⇒ 1st answer

Step-by-step explanation:

* Lets revise a fact in the circle

- The two tangents drawn from a point out side the circle are equal

∵ RSTUV is circumscribed about a circle

∴ Each side of the pentagon is a tangent to the circle

- Look to the attached figure to know how we will solve the problem

- Each tangent divided into two parts

# RS = x + y

∵ RS = 8

∴ x + y = 8 ⇒ (1)

# RV = x + n

∵ RV = 12

∴ x + n = 12 ⇒ (2)

- Subtract (2) from (1)

∴ y - n = -4 ⇒ (3)

# ST = y + z

∵ ST = 12

∴ y + z = 12 ⇒ (4)

# TU = z + m

∵ TU = 15

∴ z + m = 15 ⇒ (5)

- Subtract (5) from (4)

∴ y - m = -3 ⇒ (6)

# UV = m + n

∵ UV = 9

∴ m + n = 9 ⇒ (7)

- Add (6) and (7)

∴ y + n = 6 ⇒ (8)

- Lets solve equation (3) and equation (8) to find y

∵ y - n = -4 ⇒ (3)

∵ y + n = 6 ⇒ (8)

- Add (3) and (8)

∴ 2y = 2 ⇒ divide two sises by 2

∴ y = 1

- Lets substitute the value of y in equation (1)

∵ x + y = 8 ⇒ (1)

∵ y = 1

∴ x + 1 = 8 ⇒ subtract (1) from both sides

∴ x = 7

* The value of x is 7

plz mark me as brainlyist thxx

7 0
3 years ago
Read 2 more answers
Please help me asap!
bazaltina [42]

Answer:

Value of A is -1

Value of B is 1

7 0
2 years ago
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