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 number less than 10.
उत्तर
S = {1, 2, 3, 4, 5, ... 20}
∴ n(S) = 20
Number less than 10 = {1, 2, 3, 4, 5 ... 9}
Required probability = `9/20`
APPEARS IN
संबंधित प्रश्न
A box contains 20 cards marked with numbers 1 to 20. One card is drawn at random. Event A is the number of the card which is multiple of 5. Write S, n(S), A and n(A).
Two coins are tossed simultaneously. Find the probability of getting at least 1 head.
A die is thrown once. Find the probability of getting a number less than 5.
A card is drawn at random from a well-shuffled deck of 52 cards. Find the probability of getting a king or an ace.
There are 25 tickets numbered 1, 2, 3, 4,..., 25 respectively. One ticket is draw at random. What is the probability that the number on the ticket is a multiple of 3 or 5?
The probability of getting 2 heads, when two coins are tossed, is
Two fair coins are tossed. What is the probability of getting at the most one head?
Box A contains 25 slips of which 19 are marked Rs 1 and other are marked Rs 5 each. Box B contains 50 slips of which 45 are marked Rs 1 each and others are marked Rs 13 each. Slips of both boxes are poured into a third box and resuffled. A slip is drawn at random. What is the probability that it is marked other than Rs 1?
A child’s game has 8 triangles of which 3 are blue and rest are red and 10 squares of which 6 are blue and rest are red. One piece is lost at random. Find the probability that it is a triangle
A child’s game has 8 triangles of which 3 are blue and rest are red and 10 squares of which 6 are blue and rest are red. One piece is lost at random. Find the probability that it is a square
