This is not the question word. That one is 多少 with a neutral second syllable, asking how many or how much. Here the second syllable keeps its third tone, and the word states a quantity or softens a statement rather than asking anything.
usage
In front of a verb or an adjective it means somewhat, often followed by 有点. After 的 it names the size of a quantity, as in 收入的多少, how much someone earns. The doubled form 多多少少 carries the same somewhat sense.
