Following frequency distribution table represents marks obtained by 60 students in Mathematics test. Using this data answer the questions 19 & 20

Q19. What is the size of the class intervals? *
( a ) 9
( b ) 11
( c ) 10
( d ) none of these
Q20. What is the upper limit of the class interval 40 - 50? *
( a ) 40
( b ) 50
( c ) 60
( d ) none of these
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Answer:
19- c
20-b
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