Advertisements
Advertisements
प्रश्न
Find the probability that a leap year selected at random will contain 53 Sundays.
उत्तर
A leap year has 366 days with 52 weeks and 2 days.
Now, 52 weeks conatins 52 sundays.
The remaining two days can be:
- Sunday and Monday
- Monday and Tuesday
- Tuesday and Wednesday
- Wednesday and Thursday
- Thursday and Friday
- Friday and Saturday
- Saturday and Sunday
Out of these 7 cases, there are two cases favouring it to be Sunday.
∴ P(a leap year having 53 Sundays) = `("Number of favourable outcomes")/"Number of all possible outcomes"`
`= 2/7`
Thus, the probability that a leap year selected at random will contain 53 Sundays is `2/7`.
APPEARS IN
संबंधित प्रश्न
There are 35 students in a class of whom 20 are boys and 15 are girls. From these students one is chosen at random. What is the probability that the chosen student is a girl?
Two dice are rolled together. Find the probability of getting such numbers on two dice whose product is a perfect square.
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.
Suppose the bulb drawn in (i) is not defective and not replaced. Now, bulb is drawn at random from the rest. What is the probability that this bulb is not defective?
A bag contains lemon-flavoured candies only. Hema takes out one candy without looking into the bag. What is the probability that she takes out an orange-flavoured candy ?
A card is drawn at random from a well-shuffled deck of 52 cards. Find the probability of getting a king or an ace.
If the probability of winning a game is 0.4, the probability of losing it is
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?
Two dice are thrown simultaneously. What is the probability of getting a doublet?
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.
