C = # of carpenter hrs , b = # of blacksmith hrs
c + b = 30...c = 30 - b
20c + 25b = 690
20(30 - b) + 25b = 690
600 - 20b + 25b = 690
-20b + 25b = 690 - 600
5b = 90
b = 90/5
b = 18 <== hrs worked as blacksmith
c + b = 30
c + 18 = 30
c = 30 - 18
c = 12 <== hrs worked as carpenter
Answer:
1/36.
Step-by-step explanation:
A total number of possible outcomes = 36.
To get a sum of 12 the possible outcomes are just 6,6.
Answer:
Step-by-step explanation:
1. 1
2. 17.5
3. 15.62
I'll do the first one:
Both novels.
Student 1 picks a novel. There are 3 novels out of 6 books total.
Now there are 5 books left.
Student 2 picks a novel. There are 2 novels out of 5 books since the other student took a novel.
To find the probability you would multiply the probability student 1 gets a novel and the probability student 2 gets a novel.

So the probability is 1/5. Or 20%