Chinese wh-word 多少 (du¯osh˘ao/ how much/many) is used to ask questions about quantity. As there is no mass/count distinction among Chinese non-human nouns, 多少 can occur in front of a noun meaning either “how much” or “how many.”
→ 你們有多少錢? ( n˘ı-men y˘ou du¯o-sh˘ao qi´an/ How much money do you have?)
→ 你們有多少人? (n˘ı-men y˘ou du¯o-sh˘ao r´en/ How many people do you have?)
多少 also functions as a pronoun to answer a question with du¯osh˘ao. For example, in the sentence 你們要多少，我們給多少 (n˘ı-men y`ao du¯o-sh˘ao, w˘omen gˇei du¯o-sh˘ao/We will pay any amount that you ask for.), 多少 functions as a pronoun for a certain amount of money.
However, if the number is small and can be easily counted, then 幾 (j˘ı/how many) is more likely to be used.
→ 你現在有幾個孩子? (n˘ı xi`an-z`ai y˘ou j˘ı ge h´aizi/ How many children do you have now?)
Reference: Chinese: a linguistic introduction by Chao Fen Sun