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sergejj [24]
2 years ago
12

You toss a coin twice. Which calculation proves that landing on tails for the first toss and heads on the second toss are indepe

ndent events?
Mathematics
2 answers:
slega [8]2 years ago
8 0
<h3>Answer with explanation:</h3>

If a coin is tossed twice than the sample space of outcomes are:

{ HH, HT, TH, TT}

Now let A denote the event that the tail comes up in the first toss

and B denote the event that head comes up on the second toss.

Let P denote the probability of an event.

Hence,

P(A)=1/2  ( As probability of tail is half during  single toss)

Similarly P(B)=1/2 ( Since , Probability of obtaining a head is half on a single toss)

Also,

P(A∩B)=1/4

( Since the outcomes is TH )

Now, as:

P(A∩B)=P(A)×P(B)

Hence,  landing on tails for the first toss and heads on the second toss are independent events.

julia-pushkina [17]2 years ago
3 0

i dont completely understand the question so if im wrong im sorry but i think the answer is a 1out 2 percent chance if it lands on tails some with heads


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2 years ago
Iliana claims that she can construct a triangle from a 12-inch rod, a 36-inch rod, and a 39.4-inch rod. Which statement explains
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A salesman normally makes a sale​ (closes) on ​% of his presentations. Assuming the presentations are​ independent, find the pro
Tamiku [17]

Answer:

(a)\ 0.0864

(b)\ 0.096

(c)\ 0.24

(d)\ 0.936

Step-by-step explanation:

Given

p \to close

q \to fail to close

p = 60\%

p = 0.60

First, calculate the value of q

Using complement rule

q = 1 - p

q = 1 - 0.60

q = 0.40

So, we have:

p = 0.60 and q = 0.40

Solving (a): Fails to close on the 4th attempt

This means that he closes the first three attempts. The event is represented as: p p p q

So, we have:

Pr = p*p*p*q

Pr = p^3*q

Pr = 0.60^3*0.40

Pr = 0.0864

Solving (b): He closes for the first time on the 3rd attempt

This means that he fails to close the first two attempts. The event is represented as: q q p

So, we have:

Pr = q * q * p

Pr = q^2 * p

Pr = 0.40^2 * 0.60

Pr = 0.096

Solving (c): First he closes is his 2nd attempt

This means that he fails to close the first. The event is represented as: q p

So, we have:

Pr = q * p

Pr = 0.40 * 0.60

Pr = 0.24

Solving (d): The first he close is one of his 3 attempts

To do this, we make use of complement rule

The event that he does not close any of his first three attempts is: q q q

The probability is:

Pr = q*q*q

Pr = q^3

The opposite is that the first he closes is one of the first three

So, we have:

Pr' = 1- Pr --- complement rule

Pr' = 1- q^3

Pr' = 1- 0.40^3

Pr' = 1- 0.064

Pr' = 0.936

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This afternoon, Sara noticed that the number of the page assigned for homework is divisible by both 12
max2010maxim [7]

Answer:

12

Step-by-step explanation:

Well, 12/12=1, which I guess is the smallest number we can get, and 12 is divisible by 2 too.

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If 30% is lost by selling a sofa set for RS 980, at what price must it be sold to gain 10%.​
PSYCHO15rus [73]

Answer:

1078

Step-by-step explanation:

first: multiply 980 by 0.10 to get 10% of 980

second: take that value (98) and add it to 980

then: you get 1078 after adding

6 0
2 years ago
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