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trapecia [35]
3 years ago
6

Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 2; B: the numbers add to 5

; C: at least one of the numbers is 2; and D: the numbers do not add to 9. Express the given event in symbols. HINT [See Example 5.] At least one of the numbers is 2, or the numbers add up to 5. C ∪ B
Mathematics
1 answer:
maxonik [38]3 years ago
6 0

Answer:

C \cup B =[(x,y),:x=2  \:Or\:  y=2 \:Or\: x+y=5, 1 \leq x \leq  6,1 \leq y \leq  6 ]\\

Step-by-step explanation:

Let the outcome from the two dice be (x,y) where x is the outcome from the red die and y is the outcome from the green die.

Event A: the red die shows 2

A=[(x,y), x=2,1 \leq y \leq  6 ]

Event B: the numbers add to 5

B=[(x,y),:x+y=5, 1 \leq x \leq  6,1 \leq y \leq  6 ]

Event C: at least one of the numbers is 2;

C=[(x,y),:x=2 \quad Or  \quad y=2, 1 \leq x \leq  6,1 \leq y \leq  6 ]

Event D: the numbers do not add to 9;

D=[(x,y),:x+y\neq 9, 1 \leq x \leq  6,1 \leq y \leq  6 ]

Therefore:

C \cup B =[(x,y),:x=2  \:Or\:  y=2 \:Or\: x+y=5, 1 \leq x \leq  6,1 \leq y \leq  6 ]\\

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