Question

if p (A) : p (not A) = 4:5, find p(A) ​

Answer 1

Answer:

4/9

Step-by-step explanation:

Let p(A) be x

then p(not A) = 1 - x

Here

$\frac{p(a)}{p(not \: a)} = \frac{4}{5}$

$\frac{x}{1 - x} = \frac{4}{5}$

$5x = 4(1 - x)$

$5x = 4 - 4x$

$5x + 4x = 4$

$9x = 4$

$x = \frac{4}{9}$