Four boys and three girls stand in queue for an interview. The probability that they stand in alternate positions is:

1.  1/35

2.  1/34

3.  1/17

4.  1/68

4

1/35

Explanation :
No Explanation available for this question

There are 6 positive and 8 negative numbers. Four numbers are chosen at random and multiplied. The probability that the product is a positive number is:

1.  500/1001

2.  503/1001

3.  505/1001

4.  101/1001

4

505/1001

Explanation :
No Explanation available for this question

A bag contains 2 red, 3 green and 2 blue balls are to be drawn randomly. What is the probability that the balls drawn contain no blue ball

1.  5/7

2.  10/21

3.  2/7

4.  11/21

4

10/21

Explanation :
No Explanation available for this question

A number is selected at random from first thirty natural numbers. What is the chance that it is a multiple of either 3 or 13

1.  17/30

2.  2/5

3.  11/30

4.  4/15

4

17/30

Explanation :
No Explanation available for this question

Marie is getting married tomorrow, at an outdoor ceremony in the desert. In recent years, it has rained only 5 days each year. Unfortunately, the weatherman has predicted rain for tomorrow. When it actually rains, the weatherman correctly forecasts rain 90% of the time. When it doesn't rain, he incorrectly forecasts rain 10% of the time. What is the probability that it will rain on the day of Marie's wedding

1.  0.567

2.  0.111

3.  0.332

4.  0.732

4

0.111

Explanation :
No Explanation available for this question

Two squares are chosen at random on a chessboard. What is the probability that they have a side in common

1.  1/18

2.  64/4032

3.  63/64

4.  1/9

4

1/18

Explanation :
No Explanation available for this question

In a game there are 70 people in which 40 are boys and 30 are girls, out of which 10 people are selected at random. One from the total group, thus selected is selected as a leader at random. What is the probability that the person, chosen as the leader is a boy

1.  4/7

2.  4/9

3.  5/7

4.  2/7

4

4/7

Explanation :
No Explanation available for this question

Sum of digits of a 5 digit number is 41. Find the probability that such a number is divisible by 11

1.  2/15

2.  11/36

3.  3/35

4.  6/35

4

6/35

Explanation :
No Explanation available for this question

Four unit squares are chosen at random on a chessboard. What is the probability that three of them are of one colour and fourth is of opposite colour

1.  80/427

2.  160/427

3.  320/1281

4.  640/1281

4

640/1281

Explanation :
No Explanation available for this question

1.  1/15

2.  1/14

3.  1/13

4.  1/12

4