Uncategorized

Cards marked with numbers 1, 2, 3, ……….., 25 are placed in a box and mixed thoroughly and one card is drawn at random from the box. The probability that the number on the card is a multiple of 3 or 5 is(a) (frac { 8 }{ 25 })(b) (frac { 13 }{ 25 })(c) … Read more

Three unbiased coins are tossed. What is the probability of getting at most two heads?(a) (frac { 7 }{ 8 })(b) (frac { 3 }{ 8 })(c) (frac { 1 }{ 4 })(d) (frac { 3 }{ 7 }) Answer Answer: (a) (frac { 7 }{ 8 })

A card is drawn from a pack of 52 cards at random. The probability of getting either an ace or a king card is(a) (frac { 4 }{ 13 })(b) (frac { 8 }{ 13 })(c) (frac { 3 }{ 13 })(d) (frac { 2 }{ 13 }) Answer Answer: (d) (frac { 2 }{ … Read more

In a throw of a die, the probability of getting a prime number is?(a) (frac { 1 }{ 2 })(b) 6(c) (frac { 3 }{ 4 })(d) (frac { 3 }{ 2 }) Answer Answer: (a) (frac { 1 }{ 2 })

A box contains 3 blue balls, 2 white balls and 4 red balls. If a ball is drawn at random from the box, the probability of getting a white ball is(a) (frac { 3 }{ 9 })(b) (frac { 4 }{ 9 })(c) (frac { 2 }{ 9 })(d) 1 Answer Answer: (c) (frac { … Read more