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solniwko [45]
3 years ago
8

The Venn diagram shows the results of two events resulting from rolling a number cube.

Mathematics
2 answers:
Gwar [14]3 years ago
5 0

Answer:  

A)P(A\cap B)=\frac{1}{3}

B)P(A)=\frac{1}{3}

C)P(A\mid B)=\frac{1}{2}

D)P(B)=\frac{2}{3}

Step-by-step explanation:

As shown in Venn diagram :

We can see that there are two outcomes that comes in the intersection part of A and B i.e. 1 and 2.

Total number of outcomes =6

So, P(A\cap B)=\frac{2}{6}=\frac{1}{3}

Next, As we can see that there are only two outcomes in the part of A i.e.

P(A)=\frac{3}{6}=\frac{1}{3}

Now, we have to find P(A\mid B)

AS we know the formula for "Conditional Probability":

PA\mid B)=\frac{P(A\cap B)}{P(B)}\\\\PA\mid B)=\frac{\frac{2}{6}}{\frac{4}{6}}\\\\PA\mid B)=\frac{2}{4}=\frac{1}{2}

Now, lat but not the least we will find P(B), as there are 4 outcomes we can see in the section of B i.e. 3, 4, 5, 6.

P(B)=\frac{4}{6}=\frac{2}{3}

Hence,

A)P(A\cap B)=\frac{1}{3}

B)P(A)=\frac{1}{3}

C)P(A\mid B)=\frac{1}{2}

D)P(B)=\frac{2}{3}


gulaghasi [49]3 years ago
4 0

Answer:   P(A\cap B)=\frac{1}{3}

P(A)=\frac{1}{3}

P(B)=1

P(A|B)=\frac{1}{3}

Step-by-step explanation:

From the given figure it can be seen that

Total number on cube= n(S)=6

Intersection of A and B = n(A ∩ B)= 2

Therefore,

P(A\cap B)=\frac{n(A\cap B)}{n(s)}=\frac{2}{6}=\frac{1}{3}

Also, The number of elements in A = 2

Therefore,

P(A)=\frac{n(A)}{n(s)}=\frac{2}{6}=\frac{1}{3}

Similarly, The number of elements in B= 6

Therefore,

P(B)=\frac{n(B)}{n(s)}=\frac{6}{6}=1

The formula to find the conditional probability is given by :-

P(A|B)=\frac{P(A\cap B)}{P(B)}\\\\\Rightarrow P(A|B)=\frac{\frac{1}{3}}{1}=\frac{1}{3}

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