Answer:
0.3 or 3/10
Step-by-step explanation:
100%=1 so 30%=0.3
Answer:
There were 3 cars and 9 buses used for the field trip.
Step-by-step explanation:
Let the number of cars be x
and Number of buses be y.
Total number of vehicles used = 9
Hence,

Also
Each Car carries students = 4
Each Bus carries students = 35
Total Students = 222
Hence,

Now multiplying equation 1 by 4 we get;

Now Subtracting equation 3 from equation 2 we get;
-(4x+4y) =222-36\\4x+35y-4x-4y=186\\31y = 186\\y = \frac{186}{31} = 6](https://tex.z-dn.net/?f=4%28x%2By%29%3D%204%5Ctimes%209%20%5C%5C%5Btex%5D%284x%2B35y%29-%284x%2B4y%29%20%3D222-36%5C%5C4x%2B35y-4x-4y%3D186%5C%5C31y%20%3D%20186%5C%5Cy%20%3D%20%5Cfrac%7B186%7D%7B31%7D%20%3D%206)
Now y = 6
∴ x + y = 9 (Given)
x + 6 = 9
x = 9 - 6
x = 3
Hence, There were 3 cars and 9 buses used for the field trip.
Step-by-step explanation:
6+8-90+90008-70000000
Answer:
Expected Number=71
Variance =4959
Standard Deviation= 70.42
Step-by-step explanation:
Expected Number = E (x) = np
Here p = 0.71 and q= 1- 0.71= 0.29 n= 100
Expected Number = E (x) = np = 0.71*100= 71
b) The Variance and Standard Deviation for the number of these tweets with no reaction
Suppose the number of tweets are hundred then the number of tweets with no reaction would be 71 .
Variance = E(x²) - [E(x)]² = (100)²- (71)²= 10000- 5041= 4959
Standard Deviation= √4959= 70.42
14-6=p
Or: 6+p=14
One of those should work :)
The answer is 8.
Let me know if you still need help.