IIT-JEE Exam

Let E and F be two independent events. The probability that exactly one of them occurs is 11/25 and the probability of none of them occurring is 2/25. If P(T) denotes the probability of occurrence of the event T, then find P(E)

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IIT-JEE Other Question
Let L be a normal to the parabola y2 = 4x. If L passes through the point (9, 6), then L is given by Let a1, a2, a3,... be in harmonic progression with a1 = 5 and a20 = 25. The least positive integer n for which an < 0