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algol13
2 years ago
7

What is the change from 3 to -8?

Mathematics
1 answer:
andreyandreev [35.5K]2 years ago
3 0

Answer:

-11

Step-by-step explanation:

3 - 11 = -8

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Answer:

There is a 2% probability that the student is proficient in neither reading nor mathematics.

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 a student is proficient in reading

B is the probability that a student is proficient in mathematics.

C is the probability that a student is proficient in neither reading nor mathematics.

We have that:

A = a + (A \cap B)

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By the same logic, we have that:

B = b + (A \cap B)

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(A \cup B) + C = 1

In which

(A \cup B) = a + b + (A \cap B)

65% were found to be proficient in both reading and mathematics.

This means that A \cap B = 0.65

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This means that B = 0.78

B = b + (A \cap B)

0.78 = b + 0.65

b = 0.13

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This means that A = 0.85

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a = 0.20

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(A \cup B) + C = 1

C = 1 - (A \cup B) = 1 - 0.98 = 0.02

There is a 2% probability that the student is proficient in neither reading nor mathematics.

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