The draws are independent, so

There is a total of 11 marbles in the bag, so

and

So

Answer:
86.05
Step-by-step explanation:
Its hard to explain but trust me and look at my ranking and see all the people Ive helped :)
Answer:
The last expression is correct
Step-by-step explanation:
We have been given the following expression for simplification;

The bases of the two expressions are the same. They are both equal to 4. When multiplying numbers with the same base, we simply add their exponents. In this case our exponents are;
4 and -9
adding them we have;
4 + (-9) = -5
The simplified expression thus becomes;

The children ate 6 3/4 rotis
3 1/4 rotis were left
check: 6 3/4+ 3 1/4 = 10
btw i love rotis!!