find mean mode and median of lifetime of the 100 tube lights from the following data :
life time : 1000-1099 , 1100-1199 , 1200-1299 , 1300-1399 , 1400-1499 , 1500-1599 , 1600-1699 , 1700-1799 , 1800-1899
No. of lights : 5 , 9, 11, 14, 18, 17, 12, 9, 5
And find continues class intervel also
(find mean by assume mean method )
Very urgent solve it fast plz
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