S is a subset within a universal set, U. If S = {x, y, 4, 9, ?), which could describe U? U = {keys on a keyboard} U = {letters}

Question

tigry1 [53]

4 years ago

13

S is a subset within a universal set, U. If S = {x, y, 4, 9, ?), which could describe U? U = {keys on a keyboard} U = {letters}

U = {numbers} U = {punctuation marks}

Mathematics

2 answers:

Brums [2.3K] · Answer 1 · 2021-12-25T12:53:42+03:00

Brums [2.3K]4 years ago

8 0

Answer:

A. U = {keys on a keyboard}

Step-by-step explanation:

Airida [17] · Answer 2 · 2021-12-25T10:36:25+03:00

S is a subset of U, so all of the elements of S must be also elements of U

If U was {letters}, 4, 9, ? would not belong there
If U was {numbers }, x, y, ? would not belong to U
If U was {punctuation marks }, 4, 9, x, y would not be in U

all the elements of S are in U={ keys on a keyboard}

Answer: U={ keys on a keyboard}