18. 100 students took a test. The result of those who secured less than
60% mark are given below:
Marks
0-20 20-40
40-60
No. of students
16
24
30
If the average mark of all students was 50, find out the average
marks of those who secured more than 60% marks.
18

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.