| x | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| y | 3 | 4 | 5 | 6 | 7 | 6 | 5 | 4 |
How many children are in the hospital
A.
36
B.
40
C.
44
D.
50
Correct answer is B
The total number of students is ∑ f = 3 + 4 + 5 + 6 + 7 + 6 + 5 + 4
= 40