Ask question

Ask question

All categories

3 years ago

14

There is a free prize drawing in a shopping mall. There are some youngsters and older people. The result of the number of winnin

g people is shown below. Which group had a higher % of winners between youngsters and older people?
- 30 older people won washing machines out of the 60 older people. - 45 youngsters won washing machines out of the 60 youngster.

2 answers:

serg [7]3 years ago

8 0

Answer:

There is a free prize drawing in a shopping mall. There are some youngsters and older peoples. The result of the number of winning people is shown below.

Which grow had highest % of winning between youngster and older people? - 30 older people won washing machines out of the 60 older people. - 45 youngsters won washing machines out of the

Scilla [17]3 years ago

5 0

Answer:

the guy or girl up top is right

Step-by-step explanation:

sorry i could'ent help but that person is completely right in i will correct if wrong

You might be interested in

The prior probabilities for events A1 and A2 are P(A1) = 0.20 and P(A2) = 0.80. It is also known that P(A1 ∩ A2) = 0. Suppose P(

Umnica [9.8K]

Answer:

(a) $A_1$ and $A_2$ are indeed mutually-exclusive.

(b) $\displaystyle P(A_1\; \cap \; B) = \frac{1}{20}$ , whereas $\displaystyle P(A_2\; \cap \; B) = \frac{1}{25}$ .

(c) $\displaystyle P(B) = \frac{9}{100}$ .

(d) $\displaystyle P(A_1 \; |\; B) \approx \frac{5}{9}$ , whereas $P(A_1 \; |\; B) = \displaystyle \frac{4}{9}$

Step-by-step explanation:

<h3>(a)</h3>

$P(A_1 \; \cap \; A_2) = 0$ means that it is impossible for events $A_1$ and $A_2$ to happen at the same time. Therefore, event $A_1$ and $A_2$ are mutually-exclusive.

<h3>(b)</h3>

By the definition of conditional probability:

$\displaystyle P(B \; | \; A_1) = \frac{P(B \; \cap \; A_1)}{P(B)} = \frac{P(A_1 \; \cap \; B)}{P(B)}$ .

Rearrange to obtain:

$\displaystyle P(A_1 \; \cap \; B) = P(B \; |\; A_1) \cdot P(A_1) = 0.25 \times 0.20 = \frac{1}{20}$ .

Similarly:

$\displaystyle P(A_2 \; \cap \; B) = P(B \; |\; A_2) \cdot P(A_2) = 0.80 \times 0.05 = \frac{1}{25}$ .

<h3>(c)</h3>

Note that:

$\begin{aligned}P(A_1 \; \cup \; A_2) &= P(A_1) + P(A_2) - P(A_1 \; \cap \; A_2) = 0.20 + 0.80 = 1\end{aligned}$ .

In other words, $A_1$ and $A_2$ are collectively-exhaustive. Since $A_1$ and $A_2$ are collectively-exhaustive and mutually-exclusive at the same time:

$\displaystyle P(B) = P(B \; \cap \; A_1) + P(B \; \cap \; A_2) = \frac{1}{20} + \frac{1}{25} = \frac{9}{100}$ .

<h3>(d)</h3>

By Bayes' Theorem:

$\begin{aligned} P(A_1 \; |\; B) &= \frac{P(B \; | \; A_1) \cdot P(A_1)}{P(B)} \\ &= \frac{0.25 \times 0.20}{9/100} = \frac{0.05 \times 100}{9} = \frac{5}{9}\end{aligned}$ .

Similarly:

$\begin{aligned} P(A_2 \; |\; B) &= \frac{P(B \; | \; A_2) \cdot P(A_2)}{P(B)} \\ &= \frac{0.05 \times 0.80}{9/100} = \frac{0.04 \times 100}{9} = \frac{4}{9}\end{aligned}$ .

6 0

2 years ago

Can you help me with this question.

HACTEHA [7]

For the scale factor, use the dimensions from similar sides:

Using 18 from the original image you would use 6 from the scaled image.

18 /6 = 3

This means the scaled image is 3 times smaller than the original. Because the scaled image is smaller divide 1 by the scale factor to get 1/3.

Q2:

The scale factor is 1 inch = 12 miles.

Multiply the total inches by 12:

6.5 x 12 = 78 miles.

3 0

3 years ago

Read 2 more answers

The base area of an oblique pentagonal prism is 15 sq. in. The prism measures 3 inches in height and the edges connecting the ba

Fantom [35]

Answer:

Option A & D are correct Option.

Step-by-step explanation:

We are given with following :

Area of Base = 15 in.²

Height of Prism = 3 in.

Length of edge of base = 5 in.

Volume of Prism = Area of Base × Height = 15 × 3 = 45 in.³

Therefore, Option A & D are correct Option.

3 0

3 years ago

Ramona is installing a kitchen counter that is 9 feet by 3 feet.

LiRa [457]

The area of the kitchen counter is 21 square ft.

<u>Step-by-step explanation:</u>

Area of the sink = 2 x 3

= 6 square ft.

Area of the kitchen counter = 9 x 3 -(6)

=27 - 6

= 21 square ft.

The area of the kitchen counter is 21 square ft.

7 0

2 years ago

The circle below has center k , and its radius is 3 cm Given that m∠LKM =70° , find the length of the major arcLNM

Veseljchak [2.6K]

The length of the major arc LNM is $\frac{29}{6}\pi \ cm$

<h3><u>Length of an arc</u></h3>

From the question,

We are to determine the value of the length of the major arc LNM

The length of the major arc LNM can be calculated using the formula

$Length \ of \ major\ arc \ LNM = \frac{Reflex \$

Where r is the radius

First, we will determine the value of the reflex ∠LKM

Reflex ∠LKM + ∠LKM = 360° (<em>Sum of angles at a point</em>)

From the given information,

∠LKM = 70°

Then,

Reflex ∠LKM + 70° = 360°

Reflex ∠LKM = 360° - 70°

Reflex ∠LKM = 290°

Also, from the question

r = 3 cm

Now, putting the parameters into the formula, we get

$Length \ of \ major\ arc \ LNM = \frac{290 ^\circ }{360 ^\circ} \times 2\pi \times 3$

Then,

$Length \ of \ major\ arc \ LNM = \frac{1740\pi}{360}$

$Length \ of \ major\ arc \ LNM = \frac{29}{6} \pi \ cm$

Hence, the length of the major arc LNM is $\frac{29}{6}\pi \ cm$

Learn more on calculating length of an arc here: brainly.com/question/2005046

5 0

2 years ago