1. Consider the following statements with reference to neap tides :

  1. Normally, there is a seven-day interval between two neap tides.
  2. At this time, the Sun and the Moon are at right angles to each other.
  3. The Moon's attraction is diminished by the counteracting force of the Sun's gravitational pull.

Which of the statements given above is/are correct?


1. A distribution consists of 3 components with frequencies 45, 40 and 55 having their means 2, 2.5 and 2 respectively. What is the mean of the combined distribution?

     


Gallery