Advertisements
Advertisements
प्रश्न
From a pack of 52 cards, two cards are drawn at random. Find the probability that one is a king and the other is a queen.
उत्तर
The number of kings is 4
The number of queens is 4
Two cards are drawn.
The probability of one king and one queen is, = `(4"C"_1 xx 4"C"_1)/(52"C"_2)`
= `(4 xx 4 xx 2)/(52 xx 51)`
= `8/(13 xx 51)`
= `8/663`
= 0.012
APPEARS IN
संबंधित प्रश्न
Suppose one person is selected at random from a group of 100 persons are given in the following
| Title | Psychologist | Socialist | Democrat | Total |
| Men | 15 | 25 | 10 | 50 |
| Women | 20 | 15 | 15 | 50 |
| Total | 35 | 40 | 25 | 100 |
What is the probability that the man selected is a Psychologist?
Three boxes B1, B2, B3 contain lamp bulbs some of which are defective. The defective proportions in box B1, box B2 and box B3 are respectively `1/2`, `1/8` and `3/4`. A box is selected at random and a bulb drawn from it. If the selected bulb is found to be defective, what is the probability that box B1 was selected?
A die is thrown. Find the probability of getting
- a prime number
- a number greater than or equal to 3
The events A and B are independent if
If the outcome of one event does not influence another event then the two events are
Let a sample space of an experiment be S = {E1, E2, ..., En}, then `sum_("i" = 1)^"n" "P"("E"_"i")` is equal to
Probability of an impossible event is _________.
An experiment has the four possible mutually exclusive and exhaustive outcomes A, B, C, and D. Check whether the following assignments of probability are permissible.
P(A) = 0.15, P(B) = 0.30, P(C) = 0.43, P(D)= 0.12
An integer is chosen at random from the first 100 positive integers. What is the probability that the integer chosen is a prime or multiple of 8?
A single card is drawn from a pack of 52 cards. What is the probability that the card will be 6 or smaller
