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finlep [7]
3 years ago
12

A bag contains 3 red marbles, 7 blue marbles and 5 green marbles. If three marbles are drawn out of the bag, what is the probabi

lity that all three marbles drawn will be green?
Mathematics
2 answers:
Gnoma [55]3 years ago
8 0

Answer:

1/3

Step-by-step explanation:

since the total number of marbles are 3+7+5=15

and the number of green marbles=5

so probability of three marbles drawn being green=5/15=1/3

Alisiya [41]3 years ago
3 0

Answer:

6/91

Step-by-step explanation:

P(all are green)= P(GGG)

P(G)×P(G)×P(G)

5/15 × 4/14 × 3/13 = 6/91

NOTE: the total marbles in the bag decreased as the green marbles were picked

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The volume of a right circular cone is 2,279.64 in cubed. If the height of the cone is 18 in, what is the diameter of the cone?
Aleksandr [31]

ANSWER

A. 22 in

EXPLANATION

The volume of a cone is calculated using the formula:

Volume =  \frac{1}{3}  \times \pi {r}^{2} h

It was given that: the volume is 2,279.64 in³

The height of the cylinder is also given as: h=18 in.

We substitute, the given values into the formula to get:

2279.64=  \frac{1}{3}  \times (3.14) \times {r}^{2}  \times 18

2279.64= 18.84 {r}^{2}

{r}^{2}  =  \frac{2279.64}{18.84}

{r}^{2}  = 121

We take positive square root to get;

r =  \sqrt{121}

r = 11in

Therefore the diameter is 2(11) which is equal to 22 inches.

5 0
3 years ago
If 6 is a factor of a number, what other numbers must be factors of<br> the number?
zysi [14]

Answer:

2 and 3

Step-by-step explanation:

6 = 2 × 3, so if a number is divisible by 6, it is also divisible by 2 and 3.

8 0
3 years ago
Which of the following is the difference of two squares
Roman55 [17]

Answer:

2nd option

Step-by-step explanation:

A difference of squares has the general form

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where the terms on either side of the subtraction ( the difference ) are both perfect squares.

The only one fitting this description is

16a² - 4y²

= (4a)² - (2y)² ← difference of squares

7 0
2 years ago
Jim is saving money to buy a game. So far he saved $36, which is three-fourths of the total cost of the game. How much does the
Andru [333]

Answer:

$48

Step-by-step explanation:

Because he has 3/4 you would divide 36 by 3 whick is 12 then multiply by 4 to get the total of $48

4 0
3 years ago
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Answer:Sally would have 2 apples left

Step-by-step explanation:Because 4-2=2 so she gave 2 away so she has 2 left.

5 0
3 years ago
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