Advertisements
Advertisements
प्रश्न
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?
उत्तर
Total number of marbles = 5 + 8 + 4 = 17
Number of red marbles = 5
Probability of getting a red marble = `"Number of favourable outcomes "/"Total number of outcomes "` = `5/17`
APPEARS IN
संबंधित प्रश्न
There are 30 tickets numbered from 1 to 30 in the box and a ticket is drawn at random. If A is the event that the number on the ticket is a perfect square, then write the sample space S, n(S), the event A and n(A).
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.
1800 families with 2 children were selected randomly and the following data were recorded:
| No. of girls in a family | 2 | 1 | 0 |
| No. of families | 700 | 850 | 250 |
Computer the probability of a family chosen at random having: 2 girls
1800 families with 2 children were selected randomly and the following data were recorded:
| No. of girls in a family | 2 | 1 | 0 |
| No. of families | 700 | 850 | 250 |
Computer the probability of a family chosen at random having: 1 girl.
One card is randomly drawn from a pack of 52 cards. Find the probability that: the drawn card is red.
One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn. Find the probability that the card is drawn is either red or king.
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.’
Fill in the boxes:
Sunita choose a card from a well-shuffled deck of 52 cards.
Total number of cards, S = `square`
Let E be the event that the choosen card is a queen.
Number of queens = `square`
Thus, P(E) = `"Number of queens"/"Total number of cards" = square/square = square`
