The table below shows the distribution of marks of 50 students in an opener examination.

      

The table below shows the distribution of marks of 50 students in an opener examination.
51020191246.png
(a) i) Find the value of y.
(ii) State the modal class.
(b) Using an assumed mean of 45.5 find the mean.
(c) Calculate
(i) Variance.
(ii) Standard deviation.

  

Answers


sharon
51020191248.png
sharon kalunda answered the question on May 10, 2019 at 09:49


Next: Make P the subject of the formula.
Previous: The position of the two towns P and Q on the earths surface are (60°N 139°E) and (60°N, 41°W) respectively.

View More Mathematics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions