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klemol [59]
3 years ago
5

Could anyone help me decipher this alien language????​

Mathematics
1 answer:
Shkiper50 [21]3 years ago
3 0

Answer:

OPTION A: $ \frac{11}{20} $

Step-by-step explanation:

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

$ P(not B) = 1 - P(B) = 1 - \frac{13}{20} = \frac{7}{20} $

$ \implies P(A \cap B)= P(A | B) \times P(B)  $

$ = \frac{11}{20} \times \frac{7}{20} $

Let us keep it without multiplying for easy simplification later.

Also, let us assume A and B are independent events.

$ P(A \cap B) = P(A) \times P(B) $

$ \implies \frac{11}{20} \times \frac{7}{20} = P(A) \times \frac{7}{20} $

$ \implies P(A) = \frac{11}{20} $

Hence, OPTION A 11/20 is the answer.

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