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ddd [48]
2 years ago
12

Please help im desperate

Mathematics
2 answers:
Anna35 [415]2 years ago
8 0

Answer:

Step-by-step explanation:

Let s be number of students and a be number of adults.

a + s = 64 -> 5a + 5s = 320

8a + 5s = 461

(8a + 5s) - (5a + 5s) = 461 - 320

3a = 141

a = 47

a + s = 64 -> s + 47 = 64 -> s = 17

Please thank, rate 5, and give brainliest if helpful!

malfutka [58]2 years ago
6 0

Answer:

a + s = 64 -> 5a + 5s = 320

8a + 5s = 461

(8a + 5s) - (5a + 5s) = 461 - 320

3a = 141

a = 47

a + s = 64 -> s + 47 = 64 -> s = 17

give brainliest if helpful!

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According to the general equation for conditional probability, if P(A, B) =4/7
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Answer:

P(A|B) = \frac{32}{49}

Step-by-step explanation:

We use the conditional probability formula to solve this question. It is

P(A|B) = \frac{P(A \cap B)}{P(B)}

In which

P(A|B) is the probability of event A happening, given that B happened.

P(A \cap B) is the probability of both A and B happening.

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We have that:

P(A \cap B) = \frac{4}{7}, P(B) = \frac{7}{8}

So

P(A|B) = \frac{P(A \cap B)}{P(B)} = \frac{\frac{4}{7}}{\frac{7}{8}} = \frac{4}{7}*\frac{8}{7} = \frac{32}{49}

Then

P(A|B) = \frac{32}{49}

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3 years ago
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Answer:

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