Question

Plea help with as many as u can will give brainliest

Answer 1

Answer:

3. 1 / 4

4. 1 / 28

5. Idk sry.

6. 35

7. 28

8. 1 / 32

9. Idk sry.

10. 48

Step-by-step explanation:

3. So there are 16 marbles in the bag, so if you take a green, it's 1/2, and then another, 1/2.

1/2 * 1/2 = 1/4

4. So there are 16 marbles again. One red would be 5 / 16, one blue would be 1 / 5, and one green would be 4 / 7

5 / 16 * 1 / 5 * 4 / 7 = 20 / 560 = 1 / 28

5.  Pick 7 out of 7, the formula is C = n! / r!(n - r)!

n = 7

r = 7

Idk sry

6. Pick 3 out of 7

n = 7

r = 3

C = 7! / 3!(7 - 3)!

C = 5040 / 6 * 24

C = 35

7.  Pick 2 out of 8

n = 8

r = 2

8! / 2!(8 - 2)!

40320 / 2 * 720

C = 28

8. You have 2 tails and 3 heads.

Say you get the first two tails.

That's 1 / 4

Then you have to get the rest heads.

1 / 8

1 / 4 * 1 / 8 = 1 / 32

9. Idk sry.

10. Multiples of 3: 33

Multiples of 5: 21

Multiples of 15: 6

33 + 21 - 6 = 48