Question

i) Arun’s mean score in the first three examination is 86.
What is the sum of the scores for the first three examination?
ii) Find the median of the following numbers: 79, 81, 89, 81, 78 , 84,76

Answer 1

A clock is a device used to measure, keep, and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units: the day, the lunar month, and the year. ... Water clocks, along with the sundials, are possibly the oldest time-measuring instruments.

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