You have two spinners each with three sections of equal size labeled with numbers 1,2,3. You spin both and observe the numbers. Let x be the sum of the two numbers. Find the probability distribution for X.

You have two spinners each with three sections of equal size labeled with numbers 123 You spin both and observe the numbers Let x be the sum of the two numbers class=

Respuesta :

From the given problem with two spinners with three sections of equal size labeled as 1, 2, and 3.

Spinner 1 : 1 2 3

Spinner 2 : 1 2 3

The sum is as follows :

1+1 = 2

1+2 = 3

1+3 = 4

2+1 = 3

2+2 = 4

2+3 = 5

3+1 = 4

3+2 = 5

3+3 = 6

There are 9 total outcomes

There are (1) 2,

(2) 3's

(3) 4's

(2) 5's

and

(1) 6

and their corresponding probability can be calculated by :

[tex]\text{probability}=\frac{\text{ quantity}}{\text{ total quantity}}[/tex]

Probability of 2 = 1/9

Probability of 3 = 2/9

Probability of 4 = 3/9 or 1/3

Probability of 5 = 2/9

Probability of 6 = 1/9

Construct the probability distribution :

To check if your probability distribution is correct.

The sum of P(X) must be equal to 1

1/9 + 2/9 + 1/3 + 2/9 + 1/9 = 1

Therefore the distribution is correct.

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