Question

7. If P (A): P (A) = 3:5, then P (A) = .....​

Answer 1

Answer:

P(A) = 0

Step-by-step explanation:

5P(A)=3P(A)

2P(A)=0

P(A)=0

Answer 2

P(A) $=\dfrac{3}{8}$

Step-by-step explanation:

We have,

P(A) : P(B) = 3 : 5

To find,  P(A) = ?

Let P(A) = 3x and P(B) = 5x

We know that,

The sum of all probabilities = 1

∴ P(A) + P(B) = 1

⇒ 3x + 5x = 1

⇒ 8x = 1

⇒ $x=\dfrac{1}{8}$

∴ P(A) $=3\times \dfrac{1}{8} =\dfrac{3}{8}$ and

P(B) $=5\times \dfrac{1}{8} =\dfrac{5}{8}$

Hence, P(A) $=\dfrac{3}{8}$