Anne has 8 unmarked computer disks in a box, where each is dedicated to exactly one of English, Spanish, Mathematics, computer science, biology, SAT preparation, college applications, and American history. If she chooses a computer disk at random, what is the probability that she chooses the SAT preparation disk?

The correct answer is 0.125.

Step-by-step explanation:

Anne has 8 unmarked computer disks in a box, namely one of English, Spanish, Mathematics, computer science, biology, SAT preparation, college applications, and American history.

Let the experiment be to pick up the SAT preparation disk from this set of 8 disk

Possible outcome is only one as there is only one SAT preparation disk.

Total number of outcomes, i.e. total number of disks available is 8.

Probability of picking of SAT preparation disk is

Probability = =  .

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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