Advertisements
Advertisements
प्रश्न
A box contains 20 discs which are numbered from 1 to 20. If one disc is drawn at random from the box, then find the probability that the number the drawn disc is a 2-digit number.
उत्तर
S = {1, 2, 3, 4, 5, ... 20}
∴ n(S) = 20
2 digit number {10, 11, 12, ... 20}
∴ n(E) = 11
Required probability = `(n(E))/(n(S)) = 11/20`
APPEARS IN
संबंधित प्रश्न
A die is thrown once. Find the probability of getting a number between 3 and 6.
If the probability of winning a game is 0.7, what is the probability of losing it?
A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?
There are 40 students in a class of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. He writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs them thoroughly. She then draws one card from the bag. What is the probability that the name written on the card is the name of a boy ?
A card is drawn at random from a well-shuffled deck of 52 cards. Find the probability of getting a red ace.
A card is drawn at random form a well-shuffled deck of playing cards. Find the probability that the card drawn is neither a king nor a queen.
Tickets numbered 2, 3, 4, 5, ..., 100, 101 are placed in a box and mixed thoroughly. One ticket is drawn at random from the box. Find the probability that the number on the ticket is an even number.
Which of the following cannot be the probability of an event?
If an event cannot occur, then its probability is ______.
Two coins are tossed simultaneously. What is the probability of getting at most one tail?
