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
liubo4ka [24]
3 years ago
10

Nine cards are numbered from 1 to 9 and placed in a box. One card is selected at random and not replaced. Another card is random

ly selected. What is the probability of selecting two prime numbers?
Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

1/6

Step-by-step explanation:

There are 4 primes. So the probability for the first draw is 4/9. Since the card is not replaced, the second probability is 3/8. 3/8 * 4/9 is 12/72, which simplifies into 1/6.

Alex_Xolod [135]3 years ago
8 0

Answer:

1/6

Step-by-step explanation:

There are 4 possible primes: 2, 3, 5, 7

First card has 4/9 probability of being a prime. Second card has 3/8 probability of being a prime(since 3 prime cards left and 8 total cards left because we do not replace the first card). 4/9 * 3/8 = 1/6.

Another way to do this is using combinatorics. C(9,2) = 36 ways to choose 2 distinct cards, C(4,2) = 6 ways to choose two of the "prime" cards. 6/36 = 1/6.

You might be interested in
The distance between Anubhav’s school and his house is 45 km. He started from his house for school at 7:00 am and covered 30 km
8_murik_8 [283]

Answer:

45 km/h

Step-by-step explanation:

In the first part of the trip, he already covered 30 km so we can subtract that from the total distance

45 - 30 = 15

This means he has 15 km to go

He also took an hour, or 60 minutes, to get to school. We subtract the time spent of the first part and time spent talking to a friend from the 60 minutes

60 - 35 = 25

25 - 5 = 20

He took 20 minutes to cover the second part of the journey

Speed = distance/time

15/20 = 0.75

He covered 0.75 km per MINUTE

to find it in km/h, we just multiply the number by 60

0.75 x 60 = 45

6 0
3 years ago
Read 2 more answers
a fair (6 sided) die is rolled TWO times. What is the probability that the first die is a 2 or the second die is a prime
alexdok [17]

Answer:

The probability that the first die is a 2 or the second die is a prime = 1/12

Step-by-step explanation:

It is given that,a fair (6 sided) die is rolled TWO times.

The sample space for rolling 2 dies

(1, 1), (1, 2) .......... (1,6)

(2,1) ..........................

.

.

(6, 1) ..........................(6, 6)

There are total of 6^2  = 36 sample space

<u>To find the probability</u>

The prime numbers from 1 to 6 are 2, 3 and 5

the  possible outcomes are(2,1), (2, 3) and (2, 5)

The probability that the first die is a 2 or the second die is a prime = 3/36 = 1/12

4 0
3 years ago
2-5|5m-5|=-73 absoute value
Wewaii [24]
Solutions i found was  m=4 or  m=-2<span>

</span>
6 0
3 years ago
Read 2 more answers
Kristen filled his 52 ounce mug full of his favorite soda at the gas station it cost a total of $1.07 how much money is it for e
NikAS [45]

Answer:

$0.02

Step-by-step explanation:

$1.07 / 52 = $0.0205769230769

Simplified is $0.02

4 0
3 years ago
Read 2 more answers
N-9 = 13<br> ------------------
Vera_Pavlovna [14]

Answer:

n-9=13

n=22

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Help please best answer
    6·1 answer
  • A bottle contains red beads and white beads.
    7·1 answer
  • X<br> 17- 5 +<br> 17<br> 싸<br> What is X? ?
    14·1 answer
  • I been stuck on dis anybody know it?
    7·1 answer
  • Which number is a rational number???
    12·1 answer
  • Carlos has 32 envelopes and wants to deliver 3 envelopes to each class. How many classrooms will he visit?
    8·1 answer
  • PLEASE HELP!!! URGENT!!!​
    10·2 answers
  • What is the 6th term in the arithmetic sequence below?
    13·1 answer
  • Find the quotient of x^3 + 4x^2 - x - 4 divided by x + 1
    11·1 answer
  • 75 kilometers in 5 minutes is how many per minute
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!