Answer:
-a +27=28
Step-by-step explanation:
2a+12-3a+15=18
-a+27=18
Gurlll if you don’t do what thing says and I dunno
Answer:
a. mean = 820; standard deviation = 57.74
b.0.75 or 75%
Step-by-step explanation:
Lower limit (L) = 720
Upper limit (U) =920
a.The mean of an uniform distribution is given by:
The standard deviation of an uniform distribution is given by:
b. The probaility that X is less 870 is:
Answer:
B
Step-by-step explanation:
72 + y + y = 180
72 + 2y = 180
2y = 108
2y/2 = 108/2
y = 54
Hope this helps ^-^
Answer:
C. 0.403
Step-by-step explanation:
Binomial distribution has two parameter n and p. Here, n=15 and p=0.60.
We have to find the probability of 10 or more will show that the hamburger, French fries and a drink were ordered. P(X≥10)=?
The binomial probability distribution function for random variable X is
where q=1-p=1-0.6=0.4,n=15 and p=0.6.
P(X≥10)=P(X=10)+P(X=11)+P(X=12)+P(X=13)+P(X=14)+P(X=15)
=0.185938
=0.126776
=0.063388
=0.021942
=0.004702
=0.000470
P(X≥10)= 0.185938
+0.126776
+0.063388
+0.021942
+0.004702
+0.000470
P(X≥10)=0.403216
So, the probability of 10 or more will show that the hamburger, French fries and a drink were ordered is 0.403.