Advertisements
Advertisements
प्रश्न
A box contains tokens numbered 5 to 16. A token is drawn at random. Find the probability that the token drawn bears a number divisible by:
- 5
- Neither by 2 nor by 3
उत्तर
S = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
Total no. of tokens = 12
(a) Favourable outcomes = {5, 10, 15}
P (No. divisible by 5) = `("No. of favourable outcomes")/("Total no. of possible outcomes")`
`= 3/12 = 1/4`
(b) Favourable outcomes = {5, 7, 11, 13}
P(neither divisible by 2 nor by 3) = `4/12 = 1/3`
APPEARS IN
संबंधित प्रश्न
A single letter is selected at random from the word ‘Probability’. Find the probability that it is a vowel.
There are 25 discs numbered 1 to 25. They are put in a closed box anx shaken thoroughly. A disc is drawn at random from the box.
Find the probability that the number on the disc is :
(i) an odd number
(ii) divisible by 2 and 3 both.
(iii) a number less than 16.
A box contains 5 red marbles, 8 white marbles and 4 grem marbles. One marble is taken out of the box at randam.
What is the probability that the marble taken out wil be
(i) red?
A box contains 5 red marbles, 8 white marbles and 4 grem marbles. One marble is taken out of the box at randam.
What is the probability that the marble taken out wil be
(ii) white?
A student made a cube-shaped die from a card sheet. Instead of writing numbers 1,2,3,4,5,6 on its face, he wrote letters a,b,c,d,e,f one on each face randomly. If he rolls the die twice, find the probability that he gets a vowel on the upper face both times.
A card is drawn at random from a well-shuffled pack of 52 cards. Find the probability that at the card drawn is neither a red card nor a queen.
Find the probability that leap year selected at random, will contain 53 Sundays.
In a set of 25 cards, each card bears only one number from 1 to 25. One card is drawn randomly. Write the sample space for this random experiment
Write the event in the set form for the following random experiment. ‘If one die is thrown, the number obtained on the upper face is even.’
If a letter is choosen randomly from all the letters of the word 'MAINTAINANCE', what is the probability that the choosen letter is a consonant
