Advertisements
Advertisements
प्रश्न
A coin is tossed two times. Find the probability of getting at most one head.
उत्तर
The possible outcomes, if a coin is tossed 2 times is
S = {(HH), (TT), (HT), (TH)}
∴ n(S) = 4
Let E = Event of getting at most one head
= {(TT), (HT), (TH)}
∴ n(S) = 3
Hence, required probability = `(n(E))/(n(S)) = 3/4`
APPEARS IN
संबंधित प्रश्न
Five cards, the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random. What is the probability that the card is the queen?
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a face card.
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting the jack of hearts.
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 a perfect square?
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 and these are equally likely outcomes. Find the probability that the arrow will point at any factor of 8.
If P(E) denotes the probability of an event E then
The probability of getting exactly one head in tossing a pair of coins is ____________.
Apoorv throws two dice once and computes the product of the numbers appearing on the dice. Peehu throws one die and squares the number that appears on it. Who has the better chance of getting the number 36? Why?
Two dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on the dice is a prime number?
A bag contains 6 red, 4 black and some white balls:
- Find the number of white balls in the bag if the probability of drawing a white ball is `1/3`.
- How many red balls should be removed from the bag for the probability of drawing a white ball to be `1/2`?
