1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ziro4ka [17]
3 years ago
14

There are 10 boys trying out for the track team. Truman and Ryan are the two fastest runners. If the coach randomly picks two bo

ys to run a sprint, what is the probability that he will pick Truman and then Ryan?
Mathematics
1 answer:
vichka [17]3 years ago
5 0
10 kids total

picking Truman would be 1 out of 10 or 1/10

then there would be 9 kids left so picking Ryan would be 1 out of 9 or 1/9

the probability of picking both would be 1/10 * 1/9 = 1/90
You might be interested in
How to guess the number someone is thinking?
Anvisha [2.4K]
Once your friend has thought of a number, do the following:
1. Ask him or her to multiply the chosen number by 2.
2.Choose an even number to use yourself. Ask your friend to add this number to the one in his head.
3.Tell him/her to divide the new number by 2.
4.Tell your friend to subtract his original number from the equation.
5."Guess" the number.
:)
6 0
3 years ago
A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th
OlgaM077 [116]

Answer:

Interval [16.34 , 21.43]

Step-by-step explanation:

First step. <u>Calculate the mean</u>

\bar X=\frac{(23+18+23+12+13+23)}{6}=18.666

Second step. <u>Calculate the standard deviation</u>

\sigma =\sqrt{\frac{(23-18.666)^2+(18-18.666)^2+(23-18.666)^2+(12-18.666)^2+(13-18.666)^2+(23-18.666)^2}{6}}

\sigma=\sqrt\frac{18.783+0.443+18.783+44.435+5.666+18.783}{6}

\sigma=\sqrt{17.815}=4.22

As the number of data is less than 30, we must use the t-table to find the interval of confidence.

We have 6 observations, our level of confidence DF is then 6-1=5 and we want our area A to be 80% (0.08).  

We must then choose t = 1.476 (see attachment)

Now, we use the formula that gives us the end points of the required interval

\bar X \pm t\frac{\sigma}{\sqrt n}

where n is the number of observations.

The extremes of the interval are then, rounded to the nearest hundreth, 16.34 and 21.43

6 0
3 years ago
What is the expression in factored form x^2+13x+42
omeli [17]
The correct answer is (x+6)(x+7). Great job.
8 0
3 years ago
Read 2 more answers
Slope 2 passing through 10,8
nlexa [21]
Use y=Mx+b    with x=10 and y=8
4 0
3 years ago
What is the circumference of a circle with area 50cm2. Give your answer to three significant figures.
Mnenie [13.5K]

Answer:

c = 25.1

Step-by-step explanation:

C = 2\sqrt{pi A}

C = 2 \sqrt{3.14 * 50 }

C = 25.1

Mark me brainly plz

7 0
3 years ago
Other questions:
  • Solve the following equation. Determine if the equation is an "identity" or "contradiction."
    14·1 answer
  • Martin wants to buy a new car. The price of the car is $28,249. If Martin gets a bank loan with a simple interest rate of 3.49%
    7·1 answer
  • A goat is tied at one corner of a 12 feet by 16 feet barn. If the rope is 24 feet long, find the area of the region outside the
    12·1 answer
  • If, for a sample in which the subjects are randomly chosen, the mean income is $45,000, the sample size is 1600, the standard de
    7·1 answer
  • the length of a rectangle is 50 feet less than its width. If the perimeter of the field is 840 feet, find the length of the fiel
    8·1 answer
  • Help me plssssssssssssss
    5·1 answer
  • a set of date consists of 225 observations. the lowest value of the data set is 2,403; the highest is
    10·1 answer
  • 2(a-3)<br>Expand please​
    6·1 answer
  • A similar scale model of a building is 12 in tall and 9 in wide. If the actual building is 100 ft tall, how wide is the building
    9·1 answer
  • How would logx (49) = x look like in exponential form
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!