The question you provided, "How many monkeys are in the picture?", is grammatically correct. Let's break it down:
- How many: This phrase is used to ask about the quantity of countable nouns, like "monkeys."
- monkeys: This is the plural noun being counted.
- are: The correct form of the verb "to be" used with plural subjects.
- in the picture: This prepositional phrase tells us where the monkeys are located.
So, the question is perfectly phrased for asking about the number of monkeys shown in a picture.