Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20
B. 100
C. 10
D. 500
Answer: C
Mathematics
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State the domain of the given function.y = 
A. All real numbers x > - 7 B. 7 C. All real numbers except 7 D. All real numbers
Mathematics
Use the table of z-scores and percentiles to find the percentage of data items in a normal distribution that lie a. above and b. below the given score.z = -0.9
A. 18.41%, 18.41% B. 81.59%, 18.41% C. 0%, 100% D. 18.41%, 81.59%
Mathematics
The matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
A. x = -2, y =4, z = -1 B. x = 4, y = -2, z = -1 C. x = -2, y = -1, z = 4 D. x = 4, y = -1, z = -2
Mathematics
Solve.6 + 
- x = 0
A. 3 B. 12 C. 3, 12 D. empty set solution
Mathematics