Question

9.
A bag contains 5 white marbles, 4 black marbles, and 1 red marbles. Find the probability of picking a white marble?


two-fifths

one-half

one-fifth

one-tenth
10.
In a bag of marbles you have 3 green, 2 yellow, 6 blue, and 9 red marbles. What is the probability of picking a red marble from the bag?


three-twentieths

one-tenth

three-tenth

nine-twentieths
11.
In a bag of marbles you have 3 green, 2 yellow, 6 blue, and 9 red marbles. What is the probability of picking a yellow marble from the bag?


three-twentieths

nine-twentieths

o

Answer 1

Q: 9

There are 10 marbles total.

You want to know the probability of choosing white.

There are 5 marbles total.

5/10 is the probability of picking a white marble.

We can simplify this fraction to 1/2

Answer 2

Q: 10

There are a total of 20 marbles.

There are 9 red marbles.

So the probability of picking a red marble is 9/20.

Answer 3

Q: 11

There are 20 marbles total

There are 2 yellow marbles.

So the probability of picking a yellow marble is 2/20 or 1/10.

Answer 4

@chappy0729

Answer 5

thankn you so much !!!!!! @iGreen

Answer 6

No problem.

Answer 7

can you help me one more? @iGreen

Answer 8

Sure

Answer 9

14.
A bag has 7 red marbles, 8 blue marbles and 3 black marbles. What is the probability of picking a blue marble, replacing it, and then picking a red marble?


seven one-hundred-sevenths

one-ninth

two twenty-sevenths

fourteen eighty-firsts
15.
A bag has 2 yellow, 7 red, and 1 green marble. What is the probability of picking a red marble, replacing it, and then picking another red marble?


forty-nine hundredths

one fiftieth

seven hundredths

one twenty-fifth
16.
A bag has 2 yellow, 7 red, and 1 green marble. What is the probability of picking a green marble, replacing it, and then picking a yellow marble?


seven hundredths

one fiftieth

forty-nine hundredths

one twenty-fifth
17.
A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a green marble, do not replace it, and pick a red marble?


one twenty-eighth

three twenty-eighths

nine fifty-sixths

one-eighth
18.
A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a red marble, do not replace it, and pick yellow marble?


three twenty-eighths

one twenty-eighth

nine fifty-sixths

one-eighth
19.
A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick another yellow marble?


nine fifty-sixths

three twenty-eighths

one twenty-eighth

one-eighth

Answer 10

@iGreen

Answer 11

A bag has 7 red marbles, 8 blue marbles and 3 black marbles. What is the probability of picking a blue marble, replacing it, and then picking a red marble? There are 18 marbles total. The probability of taking a blue marble is 8/18 or 4/9. The probability of taking a red is 7/18. Multiply these two to find the probability. 4/9 * 7/18 = 14/81. So the probability of picking a blue and then a red is 14/81.

Answer 12

A bag has 2 yellow, 7 red, and 1 green marble. What is the probability of picking a red marble, replacing it, and then picking another red marble?

There are 10 marbles total. The probability of taking a red marble is 7/10. Multiply this by 7/10 to find the probability of picking a red and then another red. 7/10 * 7/10 = 49/100. So the probability of picking a red and then another red is 49/100.

Answer 13

A bag has 2 yellow, 7 red, and 1 green marble. What is the probability of picking a green marble, replacing it, and then picking a yellow marble?

The probability of picking a green marble is 1/10. The probability of picking a yellow marble is 2/10. Multiply these to find the probability of picking a green marble and then a yellow marble. 1/10 * 2/10 = 1/50. So the probability of picking a green marble and then a yellow marble is 1/50.

Answer 14

A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a green marble, do not replace it, and pick a red marble?

The probability of picking a green marble is 2/8 or 1/4. The probability of picking a red marble AFTER you have picked a green marble is 3/7. Multiply these two to find the probability. 1/4 * 3/7 = 3/28. So the proabability of picking a green marble and then a red marble is 3/28.

Answer 15

A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a red marble, do not replace it, and pick yellow marble?

The probability of picking a red marble is 3/8. The probability of picking a yellow marble after the red marble is 3/7. Multiply these to find the probability. 3/8 * 3/7 = 9/56. So the probability of picking a red marble and then a yellow marble is 9/56.

Answer 16

A bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick another yellow marble?

The probability of picking a yellow marble is 3/8. The probability of picking a yellow marble after you already picked a yellow one is 2/7. Multiply these to find the probability. 3/8 * 2/7 = 3/28. So the probability of picking a yellow marble and then another is 3/28.

Answer 17

@chappy0729

Answer 18

Thank you so much. @iGreen

Answer 19

No problem.