Answer:800
Step-by-step explanation:

and 




Using Z table to get InvNormal(0.9893)=2.30


Answer:
60 is the ans hope it may help u
bcz 30 + 90 + y = 180 120 +y =180 , y = 180 -120 = 60
We are told that 21% of the total cans is 63 cans, therefore
100% of all the cans collected would be.
(63*100)/21=300 cans were collected in all