Ask question

Ask question

All categories

2 years ago

9

a pen is randomly picked from a box that contains 12 red pen,13 blue pen and 5 black pen. calculate the probability of getting a

black pen.

1 answer:

Firdavs [7]2 years ago

3 0

12 plus 13 plus 5 is 30
5 divided by 30 is .16666667
Move the decimal get 16%

You might be interested in

Evaluate the expression 6(x) when x equals 3.<br><br><br><br> Pls... I need help.

Leto [7]

Answer:

18

Step-by-step explanation:

substitute x = 3 into the expression

6x = 6(3) = 6 × 3 = 18

7 0

2 years ago

Which statements are true about the circle shown below?

svp [43]

Answer:

its a half circle

Step-by-step explanation:

3 0

3 years ago

You are cutting out pieces of 8.5 by 11 inch construction paper that have a diameter of 2.5 inches. You have 20 pieces of constr

True [87]

Answer:

260

Step-by-step explanation:

You can cut 13 circles from each piece of paper, so ...

20 papers × (13 circles/paper) = 260 circles

8 0

3 years ago

For a party, three solid cheese balls with diameters of 2 inches, 4 inches, and 6 inches, respectively, were combined to form a

schepotkina [342]

Answer:

The radius of the new cheese ball formed is approximately 6.603 inches.

Step-by-step explanation:

We are given the following in the question:

Radius of three cheese ball = 2 inches, 4 inches, and 6 inches

They were combined to form a new cheese ball.

Thus, we can write

Volume of three cheese balls = Volume of new cheese ball.

Let r be the radius of new cheese ball.

Volume of sphere =

$\displaystyle\frac{4}{3}\pi r^3$

Putting values, we get:

$\displaystyle\frac{4}{3}\pi r_1^3 + \displaystyle\frac{4}{3}\pi r_2^3 +\displaystyle\frac{4}{3}\pi r_3^3 =\displaystyle\frac{4}{3}\pi r^3\\\\\frac{4}{3}\pi(2^3 + 4^3 + 6^3) = \displaystyle\frac{4}{3}\pi r^3\\\\2^3 + 4^3 + 6^3 = r^3\\\Rightarrow 288 = r^3\\\Rightarrow r = (288)^{\frac{1}{3}}\\\Rightarrow r \approx 6.603$

Thus, the radius of the new cheese ball formed is approximately 6.603 inches.

3 0

2 years ago

Exercise 1 (SW Chapter 5): Suppose that a researcher, using wage data on 250 randomly selected male workers and 280 female worke

kirza4 [7]

b) answered. In what fraction of the samples would H0 from

3 0

3 years ago