2. Which of the following sets are the Null Set ?A = {x\x is a letter

1.	2. Which of the following sets are the Null Set ?A = {x\x is a letter before 'a' in the English alphabet).B = {x \| x + 5 = 5)C = {x\|x is less than 7 and greater than 8}D = {x\|x is past president of Pakistan who was a woman}
Answer» ANSWER: OPTION A , C is a null sets SOLUTION : 1) No letter comes before A in english alphabet 2) x+5 = 5, hence x = {0} (A FINITE SET ) 3) IT is not possible 4) It is a finite set , x = {Benazir Bhutto} THANKS:)

2. Which of the following sets are the Null Set ?A = {x\x is a letter before 'a' in the English alphabet).B = {x | x + 5 = 5)C = {x|x is less than 7 and greater than 8}D = {x|x is past president of Pakistan who was a woman}

Answer»

ANSWER:

OPTION A , C is a null sets

SOLUTION :

1) No letter comes before A in english alphabet

2) x+5 = 5, hence x = {0} (A FINITE SET )

3) IT is not possible

4) It is a finite set , x = {Benazir Bhutto}

THANKS:)

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2. Which of the following sets are the Null Set ?A = {x\x is a letter before 'a' in the English alphabet).B = {x | x + 5 = 5)C = {x|x is less than 7 and greater than 8}D = {x|x is past president of Pakistan who was a woman}​

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2. Which of the following sets are the Null Set ?A = {x\x is a letter before 'a' in the English alphabet).B = {x | x + 5 = 5)C = {x|x is less than 7 and greater than 8}D = {x|x is past president of Pakistan who was a woman}