Probability Test

Result

Probability Test - 74

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

A bag contains a white and b black balls. Two players A and B alternately draw a ball from the beg replacing the ball each time after the draw till one of them draws a white ball and wins the game. A begins the game. If the probability of A winning the game is three times that of B, then the ratio a:b is

A
1:1

B
1:2

C
2:1

D
None of these

Solution
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

In n positive integers are taken at random and multiplied together, the probability that the last digit of the product is 2, 4, 6 or 8 is

A

B

C

D
None of these

Solution
Question 4
4 / -1

If P(A) = 0.3, P(B) = 0.4, P(C) = 0.8, P(AB) = 0.08, P(AC) = 0.28, P(ABC) = 0.09, P(A + B + C) ≥ 0.75 and P(BC) = x then

A
0.23 ≤ x ≤ 0.48

B
0.32 ≤ x ≤ 0.84

C
0.25 ≤ x ≤ 0.73

D
None of these

Solution
Question 5
4 / -1

An unbiased coin I tossed. If the result is a head, a pair of unbiased dice is rolled and the number of obtained by adding the numbers on the two faces is noted. If the result is a tail, a card from a well shuffled pack of eleven cards numbered 2, 3, 4,..,12 is picked and the number on the card is noted. The probability that the noted number is either 7 or 8, is

A
0.24

B
0.244

C
0.024

D
None of these

Solution
Question 6
4 / -1

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 then will be alive next 30 years

A

B

C

D

Solution
Question 7
4 / -1

A rifle man is firing at a distant target and has only 10% chance of hitting it. The minimum number of round he must fire in order to have 50% chance of hitting it at least once is

A
7

B
8

C
9

D
6

Solution
Question 8
4 / -1

If the integers m and n are chosen at random between 1 and 100, then the probability that a number of the form 7^m + yⁿ is divisible by 5 equals

A

B

C

D

Solution
Question 9
4 / -1

There are four machines and it is known that exactly two of them are faulty. They are tested, one by one, in a random order till both the faulty machines are identified. Then the probability that only two tests are needed is

A

B

C

D

Solution
Question 10
4 / -1

Two persons A and B take turn is throwing a pair of dice. The first person to throw 9 from both dice will be awarded the prize. If A throws first then probability that B wins the game is

A

B

C

D

Solution