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find the probability for each situation. question 1. A number cube is a spun two times. find the probability that it will land on a event number both times.

Sagot :

In a number cube, the sample space is {1,2,3,4,5,6}.

The even numbers are {2,4,6}.

Determine the probability for cube landing with even number first times.

[tex]\begin{gathered} P(A)=\frac{3}{6} \\ =\frac{1}{2} \end{gathered}[/tex]

Determine the probability for cube landing with even number in second time.

[tex]\begin{gathered} P(B)=\frac{3}{6} \\ =\frac{1}{2} \end{gathered}[/tex]

Since both rolling of dices are independent to each other. So probability for getting even number on both time is,

[tex]\begin{gathered} P(AandB)=P(A)\cdot P(B) \\ =\frac{1}{2}\cdot\frac{1}{2} \\ =\frac{1}{4} \end{gathered}[/tex]

Answer: 1/4