2 years ago

48% of the children in a summer camp are boys. If there are 1536 boys, how many children are there in the

Mathematics

1 answer:

nadya68 [22]2 years ago

6 0

Answer:

kkk

Step-by-step explanation:

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JulsSmile [24]

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3 years ago

If A ⊂ B, then A ∩ B = A ∪ B. always sometimes or never

Lisa [10]

Sometimes. Proof:

Assume $A\subset B$ .

Let $a\in A\cap B$ , so that $a\in A$ and $a\in B$ . Then of course $a\in A\cup B$ , so $A\cap B\subseteq A\cup B$ .

Now let $a\in A\cup B$ , so that $a\in A$ *or* $a\in B$ . Since $A\subset B$ , if $a\in A$ then $a\in B$ , so that $a\in A\cap B$ . But if $a\in B$ , then $a\not\in A$ , so it's not always the case that $a\in A\cap B$ , and therefore in general $A\cup B\not\subseteq A\cap B$ .