Question

6) The following table shows the marks scored by a class in mathematics. Taking the class mark (denoted by 'a') of the interval 30 - 40 as the assumed mear. Rewrite and complete the table and find the mean of the marks obtained

CI - 0-10, 10-20, 20-30, 30-40,
40-50, 50-60.

Fi - 20, 10, 8, 5, 4, 3.

Xi -

di=Xi-a -

Fidi -




​

Answer 1

Answer:

actually you know I am not able to understand the question means actually if it is asking that how many Mark's has been scored in the interval of 30-40 then it will be zero.

hope this helps you