Answer:
8.5 (If just pure cars then 8.)
Step-by-step explanation:
To find this, just divide 68/8 to find how many cars are washed in an hour. Plugging it into a calculator, we find out that it is 8.5. If you need elaboration, just comment.
A circle is made up of 360 degrees. Lets find the decimal form of each part of the circle.
White: 122.4/360 = 0.34
Red: 115.2/360 = 0.32
Silver: 68.4/360 = 0.19
Blue: 54/360 = 0.15
Now, solve for the car color that is not red or blue.
1 - (0.15 + 0.32)
1 - (0.47)
0.53
Therefore, the answer is C.
Best of Luck!
Answer:
0.070
Step-by-step explanation:
Y = number on trial
Y has a negative binomial distribution
r = 3
P = 30% = 0.3 probability of positive indication.
P(Y = 11) probability of 11 employees that must be tested to get 3 positives
Y-1Cr-1*p^r*q^(y-r)
Y-1 = 11-1 = 10
r-1 = 3 -1 = 2
10C2 x 0.3³x0.7⁸
45x0.027x0.05764801
= 0.070
This is the probability that 11 employees must be tested to get 3 positives.