38. Odds 8 to 5 against a person who is 40 years old living till he is 70 and 4 to 3 against another person now 50 till he will be living 80. Probability that one of them will be alive next 30 years, is :
(a) 59/91 (b) 44/91 (c) 51/91 (d) 32/91
Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Probability » Exercise - 19. If P (A) = 0.4, P (B) = x, P (A ∪ B) = 0.7 and the events A & B are independent, then x = (a) 1/3 (b) 1/2 (c) 2/3 (d) none of these
Probability » Exercise - 128. A pair of fair dice is rolled together till a sum of either 5 or 7 is obtained. Then the probability that 5 comes before 7 is : (a) 1/5 (b) 2/5 (c) 4/5 (d) none of these
Probability » Exercise - 124. The letter of the word “ASSASSIN” are written down at random in a row. The probability that no two S occur together is : (a) 1/35 (b) 1/14 (c) 1/15 (d) none of these
Probability » Exercise - 127. If A & B are two independent events such that P (A ∩ B′) = 3/25 and P (A′ ∩ B) = 8/25, then P (A) = (a) 1/5 (b) 3/8 (c) 2/5 (d) 4/5
Probability » Exercise - 120. 3 dice are thrown simultaneously. What is the probability of obtaining a total of 17 or 18 ? (a) 1/9 (b) 1/72 (c) 1/54 (d) none of these
Probability » Exercise - 19. If P (A) = 0.4, P (B) = x, P (A ∪ B) = 0.7 and the events A & B are independent, then x = (a) 1/3 (b) 1/2 (c) 2/3 (d) none of these