Question

Find the mean marks.
Class Interval No. of Students
0 and above. 120
20 and above. 108
40 and above. 90
60 and above. 75
80 and above. 50
100 and above. 24
120 and above. 9
140 and above. 0​

Answer 1

mean=Sum of observation/No of observation

=476/16

Answer 2

Step-by-step explanation:

Mean= sum of outcomes/total number of outcomes

There are total 8 outcomes

So,

$(120 + 108 + 90 + 75 + 50 + 24 + 9 + 0) </p><p>The sum of outcomes is 476</p><p>[tex]476 \div 8$

The answer is 59. 5