Advertisements
Advertisements
Question
A coin is tossed thrice. What is the probability of getting two consecutive tails?
Solution
Sample space = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
n(S) = 8
Let A be the event of getting consecutive tails
A = {HTT, TTH, TTT}
n(A) = 3
P(A) = `("n"("A"))/("n"("S")) = 3/8`
APPEARS IN
RELATED QUESTIONS
Two unbiased dice are rolled once. Find the probability of getting a doublet (equal numbers on both dice)
Two unbiased dice are rolled once. Find the probability of getting the sum as 1
Three fair coins are tossed together. Find the probability of getting atmost two tails
A bag contains 5 red balls, 6 white balls, 7 green balls, 8 black balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is white
A bag contains 5 red balls, 6 white balls, 7 green balls, 8 black balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is black or red
A bag contains 5 red balls, 6 white balls, 7 green balls, 8 black balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is not white
In a box there are 20 non-defective and some defective bulbs. If the probability that a bulb selected at random from the box found to be defective is `3/8` then, find the number of defective bulbs
The king and queen of diamonds, queen and jack of hearts, jack and king of spades are removed from a deck of 52 playing cards and then well shuffled. Now one card is drawn at random from the remaining cards. Determine the probability that the card is a king of black card
Which of the following is incorrect?
If a letter is chosen at random from the English alphabets {a, b, …, z}, then the probability that the letter chosen precedes x
