Consider the following statements in respect of class intervals of grouped frequency distribution:1. Class intervals need not be mutually exclusive.2. Class intervals should be exhaustive.3. Class intervals need not be of equal width. Which of the above statements are correct?

Consider the following statements in respect of class intervals of gro

1.	Consider the following statements in respect of class intervals of grouped frequency distribution:1. Class intervals need not be mutually exclusive.2. Class intervals should be exhaustive.3. Class intervals need not be of equal width. Which of the above statements are correct?
A.	1 and 2 only
B.	2 and 3 only
C.	1 and 3 only
D.	1, 2 and 3
Answer» C. 1 and 3 only