An electronics store receives a shipment of eight boxes of calculators, with ten calculators in each box. a quality control inspector chooses a box by putting eight identical slips of paper numbered 1 to 8 into a hat and picking a slip at random. he then chooses a calculator at random from the box selected using a similar method with ten slips of paper in a hat. he repeats the process until he obtains a sample of 5 calculators for quality control testing. does this sampling plan result in a simple random sample? explain.

Yes, this sampling plan will result in a simple random sample.

Step-by-step explanation:

Given is that -

The inspector chooses a box by putting eight identical slips of paper numbered 1 to 8 into a hat and picking a slip at random. This way ensures that any box will be chosen.

He then chooses a calculator at random from the box selected using a similar method with ten slips of paper in a hat. This way ensures that any calculator can be chosen.

We can see that the sample is RANDOM as all calculators have the same chance of being chosen. It is also a simple random sample as all samples of 5 calculators have the same chance of being chosen.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

step-by-step explanation: