Answer:
1
Step-by-step explanation:
1x1=1
Answer: 0.9987
Step-by-step explanation:
Given : The weights of newborn babies are distributed normally, with a mean of approximately 105 oz and a standard deviation of 10 oz.
i.e. 
and 
Let x represents the weights of newborn babies.
If a newborn baby is selected at random, then the probability that the baby weighs more than 75 oz will be :-
[using z-value table]
Hence, the required probability = 0.9987
Answer:
C) Solution set of{x|X<-3} n {xl x> 5) is an the empty set.
Step-by-step explanation:
Here, the solution set is given as : set of {x| x < -3 } ∩ {x l x > 5)
Now, defining the each set , we get
{x| x < -3 } = ( .... -6,-5,-4 ,-3) = P
and the SET {x l x > 5} = (5,6,7,........ ) = Q
Now, by taking the intersection of two sets,we get
P ∩ Q = NULL SET as they don not have any element in common.
⇒ {x| x < -3 } ∩ {x l x > 5} is an empty set
Hence, solution set of{x|X<-3} n {xl x> 5) is an the empty set.
Total amount of instrument players= 300
Number of brass instrument players= x (because we do not know how many there are, except that all other values that we must calculate are based off of the number of brass players we have
Number of string instruments= 3x (because 3 times more than the number of brass instruments
Number of Percussion= x-60 (because there are 60 less percussion players than brass players
So, our equation is (number of string instruments)+(number of brass instruments)+(number of percussion instruments)=300 (which is our total possible number of people
3x+x+x-60=300
3x+x+x=360
5x=360
x= 72
We have 72 brass instrument players, 3(72)= 216 string instrument players, and 72-60=12 percussion players
check: 72+216+12=300
