The answer is D complete the square
.35 as a fraction is 35/100=7/20 Hope this helps :D
Answer:
I think that the answer is 2 power n , so A is the correct choice .
Answer:
100 black marbles
Step-by-step explanation:
The experimental probability of a black marble is
P(black) = 4/20 = 1/5
We expect that out of the 500 marbles in the box, 1/5 of them are black
1/5 (500) = 100
There should be 100 black marbles
