Let E be the set of all integers with 1 at their unit places. The probability that a number chosen from {2, 3, 4, ............, 50} is an element of E, is ?
A). 5/49
B). 4/49
C). 3/49
D). 2/49
If three unbiased coins are tossed simultaneously, then the probability of exactly two heads, is
A). 1/8
B). 1/8
C). 3/8
D). 4/8
A card is drawn from a well-shuffled pack of cards. The probability of getting a queen of club or a king of heart is ?
A). 1/52
B). 1/26
C). 1/13
D). 1/39
What is the probability that a card drawn at random from a pack of 52 cards is either a king or a spade?
A). 17/52
B). 4/13
C). 3/13
D). 13/52
Four whole number taken at random are multiplied together. The chance that the last digit in the product is 1, 3, 7, or 9 is ?
A). 16/625
B). 1/210
C). 8/125
D). 4/25