Question

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S is a subset within a universal set, U.

If S = {x, y, 4, 9, ?), which could describe U?

U = {letters}

U = {numbers}

U = {punctuation marks}

U = {keys on a keyboard}

Answer 1

Step-by-step explanation:

Given  S is a subset within a universal set, U. If S = {x, y, 4, 9, ?), which could describe U? U = {letters} U = {numbers} U = {punctuation marks}

U = {keys on a keyboard}      

• Given S is a subset within a universal set U
• According to question S = (x,y,4,9,?). We need to find among the given sets which one describes the best set.
• Now U = {letters} does not hold good because it describes only letters
• Next is {numbers} does not hold good because it describes only numbers.
• Again {punctuation marks} does not hold good it describes only punctuation marks like comma, etc
• Now {keys on a key board } will be the correct option since the keys on a keyboard will have alphabets, numbers and punctuation marks mentioned in the set

Therefore U = {keys on a keyboard } will be the correct option.

Reference link will be

https://brainly.in/question/16139967

Answer 2

Answer:

Step-by-step explanation: