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
Harrizon [31]
3 years ago
12

A fish tank contains 18 goldfish and 22 guppies. If you randomly select 2 fish, what is the probability that they are both goldf

ish?
a. 1/20
b. 51/260
c. 1/22
d. 1/36
Mathematics
1 answer:
Mama L [17]3 years ago
5 0
The probability is the number of positive events divided by the number of total possible events. The probability searched will be the probability that the first fish selected is a goldfish times the probability that the second fish selected is also a goldfish. The probability that the first fish selected is a goldfish is the number of goldfish in the tank divided by the total number of fish, i.e. 18 / 40. The probality that the second fish selected is a goldfish is 17 / 39 (because there is one goldfish less in the thank). Then, the joint probability is (18/40)*(17/39) = 306/1560 =102/ 520 = 51/260. Then,<span> the answer is the option b. 51/260</span>
You might be interested in
a map has a scale mileage chart with 100 miles equal to 1 inch. If a journey across part of Texas is 650 miles, how long is the
Dvinal [7]
If 100 miles = 1 in.

650 = 6.5 x 100  and   6.5 x 1 = 6.5   

so, if the journey is 650 m...... the map is 6.5 in.
5 0
3 years ago
Help I really need help
mylen [45]
Ok well I will send it you your phone number I can text
8 0
3 years ago
Read 2 more answers
Jamie has a bag containing purple, pink, yellow, and blue marbles. There are a total of 40 marbles in the bag. Jamie randomly se
Ad libitum [116K]

Answer:

1 pink marble

Step-by-step explanation:

If Jamie selected 10 times the pink marble in a total of 420 tries, we can assume that the proportion of pink marble in the total number of marbles is:

10 / 420 = 1/42

So to predict a good number of pink marbles in the total 40 marbles, we just need to multiply the 40 marbles by the proportion found above:

pink marble = 40 * (1/42) = 0.9524

As this number needs to be a whole number, a good assumption is that there is 1 pink marble in the 40 marbles.

8 0
3 years ago
Halp mi now. pls<br> pls plsp lls plsp pls
Thepotemich [5.8K]

Answer:

-r+5<-3

Step-by-step explanation:

plug in 19 to the equation inequality

7 0
2 years ago
Any good anime recommendations?
Arte-miy333 [17]

Answer:

attack on titans

3 0
3 years ago
Read 2 more answers
Other questions:
  • Create an original rational function that has at least one asymptote (vertical, horizontal, and/or slant) and possibly a removab
    8·1 answer
  • Anyone know the answer to this?
    12·1 answer
  • A sweater, originally priced at $32, is on sale for $28. What is the percent of decrease rounded to the nearest whole number? OA
    12·1 answer
  • JN is ? between angle J and angle <br>K
    11·1 answer
  • Insert 9 rational numbers between 3/7 and 4/8​
    13·1 answer
  • A truck can be rented from Company A for ​$170 a day plus ​$0.50 per mile. Company B charges ​$80 a day plus ​$0.80 per mile to
    5·1 answer
  • Which pair of statements about the lengths of two sides of the triangle is true?
    14·2 answers
  • Help this is due TODAY! i have to show my work. PLEASE HELP
    7·1 answer
  • PLS PLS PLS HELP!!! WILL GIVE BRANLIEST
    12·2 answers
  • Please solve with explanation
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!