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Reil [10]
3 years ago
12

What are three sets of fractions that can be multiplied to get 15/56?

Mathematics
1 answer:
vredina [299]3 years ago
3 0
Much more than just 3.

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A track star runs two races on a certain day. The probability thathe wins the first race is 0.7, the probability that he wins th
NARA [144]

Answer:

a) 80% probability that he wins at least one race.

b) 30% probability that he wins exactly one race.

c) 20% probability that he wins neither race.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that he wins the first race.

B is the probability that he wins the second race.

C is the probability that he does not win any of these races.

We have that:

A = a + (A \cap B)

In which a is the probability that he wins the first race but not the second and A \cap B is the probability that he wins both these races.

By the same logic, we have that:

B = b + (A \cap B)

The probability that he wins both races is 0.5.

This means that A \cap B = 0.5

The probability that he wins the second race is 0.6

This means that B = 0.6

B = b + (A \cap B)

0.6 = b + 0.5

b = 0.1

The probability that he wins the first race is 0.7.

This means that A = 0.6

A = a + (A \cap B)

0.7 = a + 0.5

a = 0.2

A) he wins at least one race.

This is

P = a + b + (A \cap B) = 0.2 + 0.1 + 0.5 = 0.8

There is an 80% probability that he wins at least one race.

B) he wins exactly one race.

This is

P = a + b = 0.2 + 0.1 = 0.3

There is a 30% probability that he wins exactly one race.

C) he wins neither race

Either he wins at least one race, or he wins neither. The sum of these probabilities is 100%.

From a), we have that there is an 80% probability that he wins at least one race.

So there is a 100-80 = 20% probability that he wins neither race.

6 0
3 years ago
Please help it’s pretty easy and I’ll reward brainiest
Julli [10]
A, hope this helps!!
8 0
3 years ago
choose all statements about percentages that are true a. 15% of 30 is 12 b. 25% of 80 is 20 c. 30% of 50 is 25 d. 30% of 60 is 1
Mashcka [7]

Answer:a b c

Step-by-step explanation:

7 0
3 years ago
The function g(x) is graphed below. Find g(2).* N 22 need help solving please ​
Katyanochek1 [597]

Answer:

x =2, The function g(x) = g(2) = 1

6 0
3 years ago
A radio disc jockey has 8 songs on this upcoming hours playlist: 3 are rock songs,2 are reggae, and 3 are country songs. The dis
ioda
Answer:

The Probability That Both Songs Are Probably Reggae Is 2 Out Of 8. This Is Because Our Of All 8 Songs There Are Only 2 Reggae Songs So It Can Only Be Picked Twice
3 0
3 years ago
Read 2 more answers
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