Question

the arithmetic mean of the marks scored by students of a class is 58.20% of them secured a mean score of 60. the mean score of another 30% if the students was 40. the mean score of the remaining students is​

Answer 1

Answer:

68

Step-by-step explanation:

Given The arithmetic mean of the marks scored by students of a class is 58.20% of them secured a mean score of 60. the mean score of another 30% if the students was 40. the mean score of the remaining students is

According to question

Let the required mean score be a

Then 20/100 x 60 + 30/100 x 40 + 50/100 x a = 58

12 + 12 + 0.5 a = 58

0.5 a = 58 – 24

0.5 a = 34

a = 34 / 0.5

a = 68

The mean score of the remaining students is 68​