Assume that 1700 births are randomly selected and exactly 42

Assume that 1700 births are randomly selected and exactly 428 of the births are girls. Use subjective judgment to determine whether the given outcome is unlikely, and also determine whether it is unusual in the sense that the result is far from what is typically expected.

Solution

It is unlikely because there are many other possible outcomes that have similar or higher probabilities.

It is unusual because it is not about 850 as expected.