Answer: No, x is not necessarily odd based on the information provided.
Explanation:
It is stated that each baby born at the hospital last week was either a single birth or one of a pair of twins. This means that each baby can either be counted as 1 (single birth) or 2 (a pair of twins).
So, the total number of babies born, x, can be expressed as a combination of singles (1's) and pairs (2's). For example, if there were 3 single births and 4 pairs of twins, then the total number of babies would be:
Total number of babies = (3 * 1) + (4 * 2) = 11
In this case, x (11) is an odd number. However, it could also be an even number depending on the combination of singles and pairs.
Therefore, x could be either odd or even, and we cannot determine its parity based solely on the information given.