Advertisements
Advertisements
प्रश्न
A bag contains 6 red, 8 black and 4 white balls. A ball is drawn at random. What is the probability that ball drawn is not black?
उत्तर
Total no. of possible outcomes = 18 {6 red, 8 black, 4 white}
Let E ⟶ event of drawing black ball.
No. of favourable outcomes = 8 {8 black balls}
Probability, P(E) =`"no.of favorable outcomes"/"Total no.of possible outcomes"` =8/18 =4/9
`barE`⟶ event of not drawing black ball
𝑃`(barE)` = 1 − 𝑃(𝐸)
= 1 − (4/9) =5/9
APPEARS IN
संबंधित प्रश्न
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is neither a heart nor a king
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is a ten
One card is drawn from a well shuffled deck of 52 cards. Find the probability of getting a red face card
A bag contains cards which are numbered from 2 to 90. A card is drawn at random from the bag. Find the probability that it bears a two digit number
In a class, there are 18 girls and 16 boys. The class teacher wants to choose one pupil form class monitor. What she does, she writes the name of each pupil on a card and puts them into a basket and mixes thoroughly. A child is asked to pick one card from the basket. What is the probability that the name written on the card is the name of a girl?
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a number divisible by 5.
Cards marked with numbers 1, 2, 3 ......... 20 are well shuffled and a card is drawn at random. What is the probability that the number on the card is divisible by 3?
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a king of red suit.
1000 families with 2 children were selected randomly , and the following data were recorded :
| Number of girls in a family | 0 | 1 | 2 |
| Number of families | 333 | 392 | 275 |
Find the probability of a family , having
(iii) no girl
Two dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on the dice is 1?
