7. a bag contains 6 red and 10 black
marbles. if you pick a marble from the
bag, what is the probability that the
marble will be black?
8. if you pick a marble, record its color, and
return it to the bag 200 times, how many
times can you expect to pick a black
marble?

i just need the answer to number 8, to answer it you need number 7. the answer to number 7 is 5/8.

125

Step-by-step explanation:

To find the expected number of black marbles, take the probability of getting a black marble times the number of marbles drawn

P(black) * 200

5/8 *200

125

We should expect 125 black marbles

125

Step-by-step explanation:

Once you have the theoretical probability of picking a black marble which is 5/8, just multiply the number of drawings by 5/8 to get the answer to problem 8.

200 * 5/8 = 1000/8 = 125