1. A and B are independent events such that P(A ∩ 
) = 
and P(
∩ B) = 
. If P(A) > 
, then P(A) + P(B) =
Ans: (4)
Explanation:
Ans: (3)
Explanation:
3. The probabilities of A, B, C solving independently a problem are respectively given as 
The probability that the problem will be solved by any two of them is
Ans: (2)
Explanation:
4. A box A contains 2 white and 3 red balls. Another box B contains 4 white and 5 red balls. One ball is drawn at random from one of the boxes and is found to be of red colour. The probability that the ball was drawn from box B is
Ans: (2)
Explanation:
5. The probability that the independent events A and B both occur is 
. The probability that neither of the two occurs is 
. The probability of occurence of B is
Ans: (1)
Explanation:
6. Assuming that half the population is vegetarian, each of 128 researchers collect a sample of 10 individuals to see whether they are vegetarians or not. The number of researchers would you expect to report 2 people or less are vegetarians is
1) 3 2) 15 3) 7 4) 17
Ans: (3)
Explanation:
7. A student appears for Maths, Physics, Chemistry examinations. He is considered successful if he passes either in Maths and Physics or Maths and Chemistry. The probabilities of the student passing in M, P, C are respectively m, p, 
. If the probability that the student is successful is , then m + p =
1) 0 2) 1 3) 2 4) 4
Ans: (2)
Explanation:
8. A die is loaded so that the chance of throwing '1' is 
, '2' is 
, 3 or 4 or 5 is and '6' is 
. If the die is thrown two times, the probability of throwing a total '7' is
Ans: (4)
Explanation:
