Advertisements
Advertisements
प्रश्न
It is given that m a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?
उत्तर
Let E ⟶ event of 2 students having same birthday P(E) is given as 0.992
Let (`barE` ) ⟶ event of 2 students not having same birthday.
We know that, P(E) + P(`barE` ) = 1
P(`barE`) = 1 − 𝑃(𝐸)
= 1 – 0.992
= 0.008
APPEARS IN
संबंधित प्रश्न
A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball?
If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Find x.
A and B throw a pair of dice. If A throws 9, find B’s chance of throwing a higher number.
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is Red or white
A black die and a white die are thrown at the same time. Write all the possible outcomes. What is the probability of obtaining a total more than 9?
The king, queen and jack of clubs are removed from a deck of 52 playing cards and the remaining cards are shuffled. A card is drawn from the remaining cards. Find the
probability of getting a card of clubs.
Fill in blank:
Every elementary event associated to a random experiment has........... probability.
A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball drawn is – red.
If P(E) denotes the probability of an event E then
A dice is thrown once. What is the probability that the number is even?
A box contains 90 discs which are numbered 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a 2-digit number less than 40.
