935 of the boxes will weigh 25 oz or less.
The z-score for this value is
Looking this up in a z-table (http://www.z-table.com) we see that the probability of something being less than or equal to this value (the area under the curve to the left) is 0.7794.
Multiply this probability by the number of items:
0.7794(1200) = 935.28 ≈ 935.
Answer:
Step-by-step explanation
first multiply 30 by 3 then subtract it form total money she has then devide it by 5 you will get ur answer
i am not saying the answer as u need to learn how to do it for ur self
N+(n+1)= s (sum)
^ should be your formula
X over 5 would be a fraction so x on top, a line, then 5 under. so x/5 =1.08