Question

A company is testing a new device to detect certain substances inside suitcases. Currently, the device is accurate 68% of the time for suitcases that have these substances. In a test where half of the 70 test suitcases carry these substances, about how many times will the test identify a suitcase with the substance as not having it?


11


16


22


48

Answer 1

so 68% and theirs 70 cases, and half of them have substance

Answer 2

so....if a suicase with the substance is identified as not having it (basically its innacurate) how many times would it do it out of the ones that have those substances which is half of 70? is what i believe its asking.

Answer 3

so 68% of 35? or....im not sure if im doing this correctly

Answer 4

Welp since i havent gotten help for that question, heres my next one.

In a bag of marbles you have three green, two yellow, six blue, and nine red marbles. What is the probability of picking a blue marble from the bag?

would it be 3/10 since total is 20 and theirs 6 blue so 6/20 = 3/10?

Answer 5

yeah

Answer 6

?

Answer 7

For the first one it's accuracy is 68%. So 32% of the time it shows a suitcase with the substance as not having it. So it's 32% if 35.

Answer 8

For the second one your answer is correct. :)

Answer 9

1st one isnt correct though

Answer 10

What did you got for the first one?

Answer 11

its 22, ur finding 68% of 35, as 35 is half of 70

Answer 12

:o