There are 3 classes having 20, 24 and 30 students respectively having average marks in
an examination as 20,25 and 30 respectively. The three classes are represented by A, B and C and you have the following information about the three classes.
a. In class A highest score is 22 and lowest score is 18
b. In class B highest score is 31 and lowest score is 23
c. In class C highest score is 33 and lowest score is 26.
Options
A) can't be determined in both cases  B) definite decrease in both cases  C) definite increase in both cases  D) will remain constant in both cases  E) will remain constant in both cases21
Ans: B   Explanation:   Class A average is 20. And their range is 18 to 22   Class B average is 25. And their range is 23 to 31   Class A average is 30. And their range is 26 to 33   If 5 students transferred from A to B, A's average cannot be determined but B's average comes down as the highest score of A is less than lowest score of B.   If 5 students transferred from B to C, C's average cannot be determined the B's range fo marks and C's range of marks are overlapping.   can't be determined in both casesnswer:can't be determined in both cases
<result>A</result>
There are 3 classes having 20, 24 and 30 students respectively having average marks in
an examination as 20,25 and 30 respectively. The three classes are represented by A, B and C and you have the following information about the three classes.
a. In class A highest score is 22 and lowest score is 18
b. In class B highest score is 31 and lowest score is 23
c. In class C highest score is 33 and lowest score is 26.