All categories

3 years ago

A box contains eight cards labeled P, Q, R, S, T, U, V, and W. One card will be randomly chosen.

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

6 0

Answer:

7/8

Step-by-step explanation:

Probability= (Cards having letter Q to W)/(All cards) = 7/8

You might be interested in

The winner of a race ran the distance in 45s at an average speed of 9.6 m/s. The runner who came in last finished and 48 seconds

RSB [31]

Answer:

The answer to your question is speed = 9 m/s

Step-by-step explanation:

Data

Winner Last runner

time = 45 s time = 48 s

speed = 9.6 m/s

Process

1) Calculate the distance they ran using the data of the winner

speed = distance / time

-Solve for distance

distance = speed x time

-Substitution

distance = (9.6)(45)

-Result

distance = 432 m

2.- Calculate the speed of the last runner

-Substitution

speed = 432/48

-Result

speed = 9 m/s

3 0

3 years ago

Can anyone help me with my homework

alexandr402 [8]

Answer:

Step-by-step explanation:

Graph 1:

A=(-9,5)

B=(7,4)

C=(-6,-3)

D=(0,-5)

E=(8,-8)

F=(0,7)

G=(0,-8)

H=(0,4)

I=(-3,-9)

J=(-4,2)

Graph 2:

K=(5,7)

L=(0,-9)

M=(1,3)

N=-7,-5)

O=(7,-1)

P=(0,-1)

Q=(2,-4)

R=(-9,6)

S=(-3,0)

T=(0,9)

3 0

3 years ago

Read 2 more answers

A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample m

svet-max [94.6K]

Answer:

Given : The sample mean score is 51.48 .

The standard deviation for the population of test scores is 15.

The nationwide average score on this test is 50.

To Find : Perform the hypothesis test and compute the P-value?

Solution:

Sample size = n = 64

Since n > 30

So, we will use z test over here

We are supposed to find The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average.

Hypothesis : $H_0:\mu \leq 50\\H_a:\mu>50$

Formula of z test : $z =\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

$x = 51.48\\\mu = 50\\\sigma = 15\\ n = 64$

Substitute the values

$z =\frac{51.48-50}{\frac{15}{\sqrt{64}}}$

$z =0.789$

Find the value of P(z) from z table

p(z)=0.7823

Since we are given that we are supposed to find The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average.

So, p value = 1-P(z) = 1-0.7823=0.2177

In general , Level of significance is 0.05

So, p value is greater than alpha.

So, we accept the null hypothesis.

5 0

3 years ago

Read 2 more answers

Patrick is designing a large stained glass window for the library. If the area of the window is 36 feet, how long is each side

vova2212 [387]

Divide 36 by 4 sides of the window. = 9 square feet.

4 0

2 years ago

Suppose that a box of 86 circuits is sent to a manufacturing plant. Of the 86 circuits shipped, 5 are defective. The plant manag

Triss [41]

Answer:

the probability that the shipment is accepted is 0.8865

Step-by-step explanation:

Given the data in the question;

N = 86, n/d = 5 and n = 2

now, without replacement

the probability that the shipment is accepted will be;

probability that the shipment is accepted = probability that non is defectives

so p( non is defective ) = ( (86-5)/86) × ((86-5-1)/(86-1))

p( non is defective ) = ( 81 / 86) × (80/85)

p( non is defective ) = 0.8865

Therefore, the probability that the shipment is accepted is 0.8865

7 0

2 years ago