A set X has 255 proper subests .Find its cardinal number .

Cardinal number of Sets

If a set has 510 non-empty proper subsets, then find the cardinal number of the set.

Determine if the set A={1,2,3…..}is a proper subset of the set B={x:x is a rational number}

The cardinal number of a set is 5. find the cardinal number of the power set.

How many subsets in all are there of a set with cardinal number 6?

Represent each of the following sets in the Roster form and write the cardinal number of each set. S_(1)= Set of letters in the word ALLAHABAD "

Represent each of the following sets in the Roster form and write the cardinal number of each set. S_(2)= Set of months having less than 30 days .

Write each of the following sets in Roster form and write the cardinal number of each . F = { x: x is a letter in the word ' COMMON'}