the marks of 20 students of a class in a mathematics test are given below
48 50 37 49 28 17 13 39 41 45 50 9 19 43 48 47 29 25 18 20
(a) find the average marks of a student of the class. (b) how many students scored marks more than the average marks?
(c) how many students scored marks less than the average marks?
(d) how many students school marks equal to the average marks?
Answers
Answered by
3
Answer
33.7
Step-by-step explanation:
sum of observations /no. of observations
sum of observations = 674
no. of observations = 20
Answered by
4
A) to find the average we do total marks obtained/ number of students attempted
So we add up 48+ 50+ 37+ 49+ 28+ 17 +13+ 39 +41+ 45 +50+ 9 +19+ 43+ 48+ 47 +29+ 25+ 18+ 20 together
= 675 marks
Number of students attempted: 20 students
Average mark: 675/20
therefore, Average mark = 33.75
b) Number of students who scored above 33.75 are 11 students.
c) 9 students scored less than the average.
d) no student scored equal to the average.
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