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3 years ago

A group of friends wants to go to the amusement park. They have $134.75 to spend

Mathematics

1 answer:

vlabodo [156]3 years ago

3 0

Answer

about 4.

Step-by-step explanation:

asked ur mom

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A bag contains two red balls and five blue balls. You draw out a ball, record its color, replace it, and then draw out a second

Anastaziya [24]

Answer:

0.74

Step-by-step explanation:

Drawing at least 1 red ball is the same as: draw 4 red balls or draw 3 red balls or draw 2 red balls or draw 1 red ball. You can calculate all these probabilities and sum them as they are independent:

P (at least 1 red) = P (1 red) + P (2 red) + P (3 red) + P (4 red)

However you can think about the inverse success "not drawing any red" and say that:

P (at least 1 red) = 1 - P (not any red)

This is because the fact of gettin at least 1 red is the complement of getting no red ball. What happens if you do not get at east 1 red ball? Then, you get not any red ball (0 red balls).

Now we need to see the prob of getting no red ball at all, which is the prob of getting a blue ball in every draw. As we have replacing the probabilities are independent. The prob of getting 1 blue ball is:

P(1 blue) = 5/7 as there are 5 blue balls over a total 7 balls.

Now, the prob of getting another blue ball, given that you got a blue on the first is simply the product:

P(blue blue) = 5/7 * 5/7 = 25/49

So, for the third blue ball:

P(blue blue blue) = 5/7 * 5/7 * 5/7 = 125 / 343

And the forth blue ball:

P (blue blue blue blue) = 5/7 * 5/7 * 5/7 * 5/7 = 625 / 2,401 = 0.26

So, the probability of getting no red balls is 0.26. Then, the probability of getting some red ball is:

P (red) = 1 - 0.26 = 0.74

8 0

4 years ago

Read 2 more answers

Help me please,, I need help

Nady [450]

Answer:

Step-by-step explanation:

trust bro

3 0

3 years ago

marcys breakfast table has a square table top with an area of 36 square feet. what is the diagonal length of the table top

MAXImum [283]

Answer:

√36 = 6

a^2 + b^2 = c^2

6^2 + 6^2 = c^2

36 + 36 = c^2

72 = c^2

√72 = c

2 36

2 18

2 9

3 3

6√2 = c

6√2 = (estimate rounded up, 8.49)

7 0

3 years ago

A triangle is inside a circle where the triangles base is on the circles diameter. What is the area of the shaded region where t

DaniilM [7]

I believe it’s approximately 19.63

8 0

3 years ago

A satellite camera takes a rectangular-shaped picture. The smallest region that can be photographed is a 4-km by 4-km rectangle.

Lesechka [4]

So we know that the formula for the area of a rectangle is $A = lw$ .
Now both the length and width of the rectangle increase at 3 km/s, therefore, $A(t) = (3t+l)*(3t+w). Since the initial length = initial width = 4 km, then the initial area = 16 [tex]km^2$ . We want to know the time when the area is four times its original area, therefore, our new formula is: $4A(t) = (3t+l)*(3t+w)$ . Plugging in our known values we have:

$64 [km^2] = (3t + 4 [km])*(3t + 4 [km])$
$t = \frac{4}{3} s$

The area is four times its original area after <span>\frac{4}{3} s[/tex]</span>.

6 0

4 years ago