Relative speed = (45 + 30) km/h = 75 km/h = 75 × 1000 / 3600 m/s = 125/6 m/s Total distance = 120 m + 150 m = 270 m Time = 270 / (125/6) = 12.96 ≈ 13 seconds. Correct Option: d
A bag contains 14 black and 16 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
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In a lottery, there are 8 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize?
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If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
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