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A group of five persons is formed from five boys and fourgirls.
Find the probability that there are at least two girls in the group
5/6
121/126
110/129
3/7
Out of 3 girls and 6 boys a group of three members is to be formed in such a way that at least one member is agirl.
In how many different ways can it be done
84
20
64
56
A bag contains 5 red smileys, 6 yellow smileys and 3 greensmileys.
If two smileys are picked at random, what is the probability that both are red or both are green in colour
7
3/7
1/7
In a purse there are 30 coins, twenty one-rupee and remaining 50-paisecoins.
Eleven coins are picked simultaneously at random and are placed in abox.
If a coin is now picked from the box, find the probability of it being a rupee coin
1/2
4/7
5/6
2/3
In a box, there are 9 blue, 6 white and some blackstones.
A stone is randomly selected and the probability that the stone is black is ¼. Find the total number of stones in the box
18
24
20
15
In a box, there are four marbles of white color and five marbles of blackcolor.
Two marbles are chosenrandomly.
What is the probability that both are of the same color
2/9
4/9
5/9
Two letters are randomly chosen from the wordTIME.
Find the probability that the letters are T and M
1/4
4
1/6
1/8
14 persons are seated around a circulartable.
Find the probability that 3 particular persons always seated together
21/628
24/625
26/247
11/379
Two dice are rolledsimultaneously.
Find the probability of getting the sum of numbers on the on the two faces divisible by 3 or 4
5/9
7/11
3/7
6/13
A person starting with 64 rupees and making 6 bets, wins three times and loses three times, the wins and loses occurring in randomorder.
The chance for a win is equal to the chance for aloss.
If each wager is for half the money remaining at the time of the bet, then the final result is
A gain of Rs. 37
A gain of Rs. 27
A loss of Rs. 27
A loss of Rs. 37
A room contains 3 brown, 5 black and 4 whitechairs.
Two chairs are picked and are put in thelawn.
What is the probability that none of the chairs picked is white
14/55
13/33
12/55
14/33
The probability that a bowler bowled a ball from a point will hit by the batsman is ¼. Three such balls are bowled simultaneously towards the batsman from that verypoint.
What is the probability that the batsman will hit the ball
9/8
11/13
37/64
27/56
One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn find the probability the card drawn is red
13/51
2/3
1/2
1/52
A fair coin is tossed 11times.
What is the probability that only the first two tosses will yield heads
(1/2)
(1/2)^11
(11C2)(1/2)^9
(9)(1/2)
A fair six-sided die is rolledtwice.
What is the probability of getting 4 on the first roll and not getting 6 on the second roll
5/36
1/36
1/9
1/12
What is the probability that a leap year has 53 Saturdays and 52 Sundays
3/2
1/2
2/7
1/7
If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is
1
3/5
1/2
The probability that a number selected at random from the first 100 natural numbers is a composite number is
1/2
34/7
2/3
3/2
Consider 5 independent Bernoulli’s trials each with probability of success p. If the probability of at least one failure is greater than or equal to 31/32 , then p lies in the interval
[1, 32]
(1, 1/2]
(0, 1)
[1, 1/2]
One lady has 2 children, one of her child is boy, what is the probability of having both are boys
2/5
1/2
2/3
1/3
1
2
6
12
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