Three more Power Prep questions... interesting..Explinations plzz...

[indianwarrior23]

Answer is D...

[indianwarrior23]

Problem#2
2. In 1995 Division A of company X had 4,850 customers. If there were 86 service errors in division A that year, what was the service-error rate, in number of service errors per customers, for Division B of Company X in 1995?
a. In 1995 the overall service-error rate for Divisions A and B combined was 1.5 service errors per 100 custmers
b. In 1995 Division B had 9,359 customers, none of whom were customers of Division A.

C

[indianwarrior23]

3. In the XY-Coordinate plane, line l and line k intersect at the point (4,3), Is the product of their slopes negative?
a. The product of the x-intercepts of lines l and k is positive
b. The product of the Y-intercepts of lines l and k is negative

C

[touche]

#1
x=8y+12
or x=4(2y+3).... x is div by 3
a. X = 12U, where U is an integer
implies x div by 3,4 and 12
insuff as nothing about y

b. Y = 12Z, where Z is an integer
y is div by 3,4, 12
gives one option ie 3... but having evaluated a. , we know there are more options
together 12
C

[touche]

#2-C

#3-C

[touche]

Correction #1 is ... B!