To determine the likelihood of randomly picking a white ball from the jar, we can look at the number of white balls compared to the total number of balls.
There are 3 white balls out of a total of 25 balls.
The probability of picking a white ball is:
\[ \frac{\text{Number of white balls}}{\text{Total number of balls}} = \frac{3}{25} \]
Since 3 is significantly less than 25, picking a white ball is unlikely. In general terms, when the probability is much less than 50%, it is considered "very unlikely."
So the correct response is:
very unlikely.