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2 years ago

A bag contains 30 lottery balls numbered 1-30 a ball is selected, not replaced,then another is drawn.find each probability

1 answer:

6 0

The probability of the first event with x possible outcomes is equal to x/30. Also, the probability of the second event with y possible outcomes is y/29.

(1) P of 2 digit number, 21/30
P that the number is 4 is 1/29
Multiplying both probabilities will give us 7/290

(2) P that number is 19 is 1/30
P that the number is multiple by 4 is 6/29
The answer is 1/145

(3) P that number is 24 is 1/30
P that number is less than 15 is 14/29
The answer should be 7/435.

(4) P that number 1st number is perfect square is 5/30
P that second number is perfect square is 4/29.
The answer is 2/87.

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HELP ME PLZ<br> (50 POINTS)

Bogdan [553]

<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The formula for circumference is $\pi d$

1) $\pi d = 31.4$

Divide both sides by $\pi$

d = 9.99 (consider this to be 10)

Half this to find the radius

10/2 = 5

It would be figure B.

2) $\pi d = 37.68$

Divide both sides by $\pi$ :

d = 11.99 (consider this to be 12)

Divide by 2 to find the radius:

12/2 = 6

It would be figure C.

3) area = $\pi r^2$

$\pi r^2 = 153.86$

r^2 = 48.97515909

r = 6.998 (consider this to be 7)

It would be figure D

4) $\pi r^2 = 113.04$

r^2 = 35.98174

r = 5.998 (consider this to be 6)

It would be figure C.

5) radius = diameter / 2

radius = 3

$\pi (3)^2 = 28.27433$

It would be option C

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0

2 years ago

Read 2 more answers

20% of the students in the class play an instrument. if there are 35 students in class, how many play an instrument?

kondor19780726 [428]

Answer:

7 students play an instrument.

Calculation:

35=100%

20%=[20×35]÷100

6 0

2 years ago

HELP PLEASE I WILL GIVE BRAINLESTT

Inessa [10]

Answer:

Look down

Step-by-step explanation:

AC=BD

8*2=16

15*2=30

AC=16

BD=16

AB=30

CD=30

5 0

3 years ago

Plz explain.

slega [8]

Idk, why does the world need problems like this, not like everyone is going to grow up to be a math teacher.

8 0

2 years ago

In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by eval

Maslowich

In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by evaluating the expression

$d= \sqrt{12h}$

We are given the height h of a person from surface of sea level to be 350 m and we are to find the the distance to horizon d. Using the value in above expression we get:

$d= \sqrt{12*350}=64.81$

Therefore, the approximate distance to the horizon for the person will be 64.81 km

8 0

3 years ago