Answer:
9
Step-by-step explanation:
99/2 × (11+991) = 49,599
152
225 adult tickets were sold
1 + 1 = 11
The actual mass is either 453 or 447
7 percent of 450
= (7/100) * 45
= 3.15
error = 3.15 g
hence actual mass
= 450 + 3.15
= 453.15
or
= 450 - 3.15
= 446.85
