Correct option is A
Given:
P(S ∩ T) = p
P(S) = P(T)
Formula Used:
For independent events,
P(S ∩ T) = P(S)P(T)
Solution:
Let P(S) = P(T) = x.
Since S and T are independent,
P(S ∩ T) = P(S)P(T)
=> p = x × x
=> x² = p
Since probability is non-negative,
=> x = √p
Therefore,
P(S) = √p.
The correct answer is (a) √p.