Question

The following table gives the life time ( in days) of 100 electric bulbes. From this table construct a frequency distribution table and hence find the mean life time of these bulbs using any method. [4] Life time(days) Less than 50 Less than 100 Less than 150 Less than 200 Less than 250 Less than 300 Number of bulbs 7 21 52 79 91 100

Answer 1

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Cells are the basic building blocks of all living things. ... Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell