A standard number cube is tossed. Find P(3 or odd).
To find the probability of rolling a 3 or an odd number, we first need to count the number of outcomes that satisfy this condition.
There are 6 possible outcomes when rolling a standard number cube: 1, 2, 3, 4, 5, or 6.
Out of these, the numbers that satisfy the condition of being odd are 1, 3, and 5.
The numbers that satisfy the condition of being 3 or odd are 3, 1, and 5. So, there are 3 possible outcomes that satisfy the condition.
Therefore, the probability of rolling a 3 or an odd number is given by the ratio of the number of outcomes that satisfy the condition to the total number of possible outcomes.
P(3 or odd) = Number of outcomes that satisfy the condition / Total number of possible outcomes
= 3 / 6
= 1/2
So, the probability of rolling a 3 or an odd number is 1/2.