The Total solution for NCERT class 6-12
From the question, we have P(E) = ¼ , P(F) = ½ and P(E ∩ F)= 1/8
(i) P(E or F) i.e. P(E∪F)= P(E) + P(F) – P(E ∩ F)
= ¼ + ½ – (1/8)
= 5/8
= 1 – (5/8)
= (8 – 5)/8
= 3/8