Answer:
32
Step-by-step explanation:
Answer:
I think 52% of students chose art
Step-by-step explanation:
C) if you multiply it you get w^2 + 7w +11w+77, which is w^2+18w+77
The normal distribution curve for the problem is shown below
We need to standardise the value X=405.5 by using the formula


We now need to find the probability of z=0.32 by reading the z-table
Note that z-table would give the reading to the left of z-score, so if your aim is to work out the area to the right of a z-score, then you'd need to do:

from the z-table, the reading

gives 0.6255
hence,

The probability that the mean weight for a sample of 40 trout exceeds 405.5 gram is 0.3475 = 34.75%