Question

set of months with 31 days using roster method​

Answer 1

set of months with 31 days are written in

roster method as..

let the set of months with 31 days is A .

A=(January, March, may, July, August,

October, December )

I don't found currely bracket so I used

simple bracket.

I hope it helps you

Answer 2

The required set in roster form is { January , March , May , July , August , October , December }

Given :

The set of months with 31 days

To find :

To express set in the roster form

Concept :

Set :

A set is a well defined collection of distinct objects of our perception or of our thought to be conceived as a whole

Representation of Set :

A set can be represented in following ways

(i) Statement form method

(ii) Roster or tabular form method

(iii) Rule or set builder form method

Solution :

Step 1 of 2 :

Write down the given set

Here the given set is set of months with 31 days

Step 2 of 2 :

Express the set in the roster form

We know that months with 31 days are January , March , May , July , August , October , December

Now in roster form the elements are enclosed in curly brackets after separating them by commas

If S is the set of months with 31 days

Then the required roster form is

S = { January , March , May , July , August , October , December }

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