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𝑌 is the set of digits in the number 90,590.
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Write 𝑌 using the listing method.
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Well, the first thing we need to do in this question, to enable us to write 𝑌 using the listing method, is identify the digits within our number.
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Well, first of all, we can see that the digit nine appears twice.
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Then we have the digit zero, which also appears twice, and finally the digit five.
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Now, when we’re gonna list these digits, so we’re gonna list the set of digits, which is 𝑌, we only need to list each digit once.
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So therefore, the set 𝑌 would equal nine, five, and zero.
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And it’s worth noting here that a common mistake would be to list all of the digits that we have, for instance, two nines, two zeros, and a five.
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So, It’s also worth noting that it doesn’t matter which order we put them in.
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I’ve just put them here in descending order.