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Law Incorporation [45]
3 years ago
14

A science teacher needs to choose 4 students from a class of 20 to go to the library to do some research. How many different gro

ups can be selected?
A.) 3,060

B.) 104,976

C.) None are correct

D.) 73,440
Mathematics
1 answer:
densk [106]3 years ago
8 0
The number is (20 x 19 x 18 x 17) / (4 x 3 x 2). That's 4,845 . None of the choices is correct.
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Charlotte has an aquarium in the shape of a rectangular prism. it is 3/4 of a foot high/ 2 and 1/2 feet long, and 1 and 1/4 feet
Anuta_ua [19.1K]
V=xyz

V=0.75(2.5)1.25

V=2.34375 ft^3  or if you want the fraction..

V=2 11/32 ft^3
3 0
3 years ago
In a city with one hundred taxis,1 is blue, and 99 are green. A witness observes a hit-and-run by a taxi at night and recalls th
Anton [14]

Answer:

the probability the car was actually blue as claimed by the witness is 33.33%. This is a low percentage and thus, there is a reasonable doubt about the guilt of the client.

Step-by-step explanation:

We are given;

P(car is blue) = 1% = 0.01

P(car is green) = 99% = 0.99

P(witness said blue | car is blue) = 99% = 0.99

P(witness said blue | car is green) = 2% = 0.02

We will solve this by using Bayes’ formula for inverting conditional probabilities:

Thus;

P(car is blue | witness said blue) =

[P(witness said blue | car is blue) × P(car is blue)] / [(P(witness said blue | car is blue) × P(car is blue)) + (P(witness said blue | car is green) × P(car is green))]

Plugging in the relevant values gives;

(0.99 × 0.01)/((0.99 × 0.01) + (0.02 × 0.99)) = 0.3333

Thus, the probability the car was actually blue as claimed by the witness is 0.3333 or 33.33%

4 0
3 years ago
Witch is a composite number A 41 B 61 C 71 D 81 pls help me
valina [46]

Answer:

D 81

Step-by-step explanation:

It is not prime. It can be divided by a number other than 1.

8 0
3 years ago
Divide 70 in the ratio 2:5​
Serggg [28]

Answer:

Step-by-step explanation:

20:50

4 0
3 years ago
I am between 24 and 34.you say my name when you count by twos from zero . you say my name when you count by fives from zero. wha
Mariulka [41]
You would have to be 30 because multiples of 5 would only be 25 and 30 inbetween those numbers, and 25 is not an even number which it must be if you can say the number counting by 2s
4 0
3 years ago
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