Test on Probability -3

Attempt now to get your rank among 556 students!

Question 1

There are three events E₁, E₂ and E₃, one of which must, and only one can happen. The odds are 7 to 4 against E₁ and 5 to 3 against E₂. Then the odds against E₃ is –

• A65 : 23
• B65 : 32
• C55 : 76
• D23 : 65

Question 2

A dice is thrown twice. The probability of getting 4, 5 or 6 in the first throw and 1, 2, 3 or 4 in the second throw is ?

• A2/3
• B1/3
• C2/5
• D1/5

Question 3

The probability of a number n showing in a throw of a dice marked 1 to 6 is proportional to n. Then the probability of the number 3 showing in a throw is -

• A1/2
• B1/6
• C1/7
• D1/21

Question 4

A bag contains 3 white, 3 black and 2 red balls one by one three balls are drawn without replacing them. The probability that the third ball is red, is –

• A3/4
• B1/4
• C3/7
• D5/7

Question 5

If A and B are two events such that PA. = and PB. = , then -

• AP (A ∩ B) ≥
• BP (A = B) ≤
• C < P (A ∪B) ≤
• D < P (A ∪B) ≤

• 556 attempts
• 5 upvotes
• 27 comments