In a drawer there are 4 white socks, 3 blue socks and 5 grey socks. Two socks are picked randomly. What is the possibility that both the socks are of same color?
A. 4/11
B. 1
C. 2/33
D. 19/66
Basic Arithmetic
Surface area of a sphere is 2464 cm2. If its radius is doubled, then the surface area of _________?the new sphere will be
A. 4920 cm2
B. 4727 cm2
C. 9856 cm2
D. 19712 cm2
A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?
A. 2 : 1
B. 3 : 2
C. 25 : 18
D. 27 : 20
Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
A. 1/6
B. 5/8
C. 3/8
D. 5/6
From a pack of cards two cards are drawn one after the other, with replacement. The probability that the first is a red card and the second is a king is_________?
A. 1/26
B. 3/52
C. 15/26
D. 11/26
A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is___________?
A. 1/13
B. 2/13
C. 1/26
D. 1/52
What are the chances that no two boys are sitting together for a photograph if there are 5 girls and 2 boys?
A. 1/21
B. 4/7
C. 2/7
D. 5/7
What is probability of drawing two clubs from a well shuffled pack of 52 cards?
A. 13/51
B. 1/17
C. 1/26
D. 13/17
In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples?
A. 5/21
B. 5/14
C. 9/14
D. 16/21
The probability that A speaks truth is 3/5 and that of B speaking truth is 4/7. What is the probability that they agree in stating the same fact?
A. 18/35
B. 12/35
C. 17/35
D. 19/35