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
viva [34]
3 years ago
14

A bag contains 2 red marbles and 3 black marbles. If Abby picks a marble without looking, returns it to the bag, and then draws

a second marble, what is the probability that both marbles are red? Give the answer as a fraction in simplest form.
Mathematics
2 answers:
Diano4ka-milaya [45]3 years ago
8 0
Answer: 4/25

=========================================

Explanation:

Let's define two events A and B
A = event of selecting red on the first draw
B = event of selecting red on the second draw

P(A) is the notation that means "probability of event A occurring"

P(A) = 2/5 because there are 2 red marbles out of 5 total (2 red + 3 black = 5)
Similarly, P(B) = 2/5 as well because A and B deal with the same color red, and because Abby put the first marble back

Multiply the probabilities
P(A and B) = P(A)*P(B) ... see note below
P(A and B) = (2/5)*(2/5)
P(A and B) = (2*2)/(5*5)
P(A and B) = 4/25 which is the answer

Note: the equation used is only valid if events A and B are independent, which they are in this case. The fact we put the marble back means the chances of picking red are the same as before.

Illusion [34]3 years ago
6 0
The correct answer is 4/25 i just did this question
You might be interested in
Write inequalities to represent the situations below. The cargo of the truck weighs no more than 2,000 pounds. Use w to represen
Alex777 [14]

Answer:

w ≤ 2000 lb.

d ≥ $100

Step-by-step explanation:

6 0
3 years ago
HELP! 15 POINTS! 1 QUESTION!
umka2103 [35]

f(x) = 8x-9

substitute 4 in for x

f(4) = 8(4) -9

f(4) = 32 -9

f(4) =23

6 0
3 years ago
This is just a test for questions,i already know the answer. 9x4?
Vlada [557]

Answer:

if you know why do that but the answer is

36

I know I would like to do that too but that's wrong even if you are New to brainly

4 0
2 years ago
Read 2 more answers
5x + 2y = 7
zvonat [6]

Answer:

(\frac{5}{7},\frac{12}{7})

Step-by-step explanation:

The given system is

5x+2y=7

y=x+1

We substitute the bottom equation into the top equation to get:

5x+2(x+1)=7

Expand to get:

5x+2x+2=7

Group similar terms:

5x+2x=7-2

Combine similar terms:

7x=5

x=\frac{5}{7}

Put x=\frac{5}{7} into the bottom equation

y=\frac{5}{7}+1

y=\frac{5+7}{7}

y=\frac{12}{7}

The solution is

(\frac{5}{7},\frac{12}{7})

8 0
3 years ago
Read 2 more answers
Suppose you first randomly sample one card from a deck of 52. Then, without putting the card back in the deck you sample a secon
Alex787 [66]

Answer:

P(A) = 1201/5525 or 0.2174

The probability that at least one ace will be in the three sampled cards is 1201/5525 or 0.2174

Step-by-step explanation:

Let P(A) represent the probability that at least one ace will be in the three sampled cards.

P(A) = 1 - P(A') ......1

Where;

P(A') is the probability that none of the three cards will be ace.

Number of ace in a standard 52 cards = 4

Number of non-ace in a standard 52 cards = 52-4 =48

P(A') = 48/52 × 47/51 × 46/50

P(A') = 4324/5525 = 0.7826

Substituting, the value into equation 1;

P(A) = 1 - P(A')

P(A) = 1 - 4324/5525

P(A) = 1201/5525 or 0.2174

The probability that at least one ace will be in the three sampled cards is 1201/5525 or 0.2174

7 0
2 years ago
Other questions:
  • The local chess club has 60 members twenty four of the members are younger than twenty what percent of the members of the chess
    10·1 answer
  • Consider the expansion of (x + 2y)^10. Determine the coefficients for the terms with the powers of x and y shown.
    12·2 answers
  • PLEASE HELP ME FIND THE LENGTH
    8·2 answers
  • There are 15 European cities that Kevin would eventually like to visit. On his next vacation, though, he only has time to visit
    7·1 answer
  • Answer this question for 10 points and possibly brainliest.
    15·2 answers
  • Levens and frank shared a pizza levens ate 1/2 and frank ate 1/6 how much more did levens eat than Frank?
    13·1 answer
  • I WILL MARK YOU BRAINLIEST!!
    5·2 answers
  • Last month you spent $30 on clothing. This month you spent 150% of what you spent last month. How much did you spend this month?
    14·2 answers
  • Please help asap!!!!!!
    12·2 answers
  • Determine the five-number summary for this data set, taking into account any outliers. 10 13 15 12 12 4 12 17 12 13 15 18 10 11
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!