Question

solve with method ...​

Answer 1

Answer:

letter b is the correct answer

Answer 2

Answer:

(a) $\frac{1}{2}$

Step-by-step explanation:

If A and B are independent then,

$P(A$ ∩ $B)=P(A) P(B)$

Now, applying formula -

$P(A$ ∪ $B)+P(A$ ∩ $B)=P(A)+P(B)$

$0.7+(0.4)p=0.4+p$

⇒$0.7-0.4=p-0.4p$

⇒$0.6p=0.3$

⇒$p=\frac{0.3}{0.6}$

⇒$p=\frac{1}{2}$