You need to add what the lines are if you want them to be analysed for you^^
Answer:
7
Step-by-step explanation:
The order of the 3 books does not matter so its the number of combinations of 3 from 45
b is the correct choice
Answer:
You do 2/3 times 30d minus 2/3 times 15. That will give you 20d - 10
Step-by-step explanation:
(2/3x30d) - (2/3x15) = 20d - 10
