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If A = 5, 6, ...

Question

If A = {5, 6, 7, 8} and B = {7, 8, 9, 11}, then find A ∪ B.

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Solution

A ∪ B is the set that is defined as the elements present either in A (or) B (or) both.

A ∪ B = {5, 6, 7, 8, 9, 11}

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Q. If A = {5, 6, 7, 8} and B = {7, 8, 9, 11}, then find A ∪ B.

Q. In a shop, different sizes of shoes sold in a week are 7, 9, 8, 6, 7, 10, 6, 7, 8, 9, 11, 5, 6, 7, 8, 5, 9, 10, 9, 11, 12, 8, 3, 3, 5, 4, 6, 7, 4, 6, 7, 8, 8, 6, 9. What is the difference of the number between shoes sold of size 6 and size 7?

$For two sets A = {5, 6, 7, 8} & B = {7, 8, 9, 11} . A \cup B =$

Q. Calculate the mode using tally marks for the following sizes of shoes sold out by a shopkeeper: 6, 7, 6, 5, 9, 11, 10, 7, 6, 9, 11, 9, 11, 11, 10, 9, 8, 11, 8, 9, 11, 9.

Shoe Size	Tally Marks	Frequency
5
6
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Construct a frequency table for the following:
$7, 8, 6, 5, 6, 7, 7, 9, 8, 10, 7, 6, 7, 8, 8, 9, 10, 5, 7, 8, 7, 6$

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