Advertisements
Advertisements
Question
Rahim tosses two different coins simultaneously. Find the probability of getting at least one tail.
Solution
Rahim tosses two coins simultaneously. The sample space of the experiment is {HH, HT, TH, TT}.
Total number of outcomes = 4
Outcomes in favour of getting at least one tail on tossing the two coins = {HT, TH, TT}
Number of outcomes in favour of getting at least one tail = 3
∴ Probability of getting at least one tail on tossing the two coins `="Number of outcomes in favour"/"Total number of outcomes"=3/4`
APPEARS IN
RELATED QUESTIONS
A bag contains, white, black and red balls only. A ball is drawn at random from the bag.If the probability of getting a white ball is 3/10 and that of a black ball is 2/5 then find the
probability of getting a red ball. If the bag contains 20 black balls, then find the total number of balls in the bag.
A letter of English alphabet is chosen at random. Determine the probability that the chosen letter is consonant.
Two different dice are thrown together. Find the probability that the numbers obtained have
1) even sum, and
2) even product.
A box contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is a prime number.
A piggy bank contains hundred 50 paise coins, fifity ₹1 coins, twenty ₹2 coins and ten ₹5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, find the probability that the coin which fell will be of value more than ₹1
A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the card thoroughly. Find the probability that the number on the drawn card is a multiple of 5
Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is an odd number
A bag contains 5 red, 8 green and 7 white balls, One ball is drawn at random from the bag. What is the probability of getting a white ball or a green ball?
A die is thrown once. Find the probability of getting a number less than 3.
Two dice are thrown together. The probability of getting the same number on both dice is
Two different dice are rolled simultaneously. Find the probability that the sum of the numbers on the two dice is 10.
A lot consists of 144 ballpoint pens of which 20 are defective and others good. Tanvy will buy a pen if it is good, but will not buy it if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will buy it,
Cards numbered 1 to 30 are put in a bag. A card is drawn at random from the bag. Find the probability that the number on the drawn card is not a perfect square number.
In a hockey team there are 6 defenders, 4 offenders and 1 goalee. Out of these, one player is to be selected randomly as a captain. Find the probability of the selection that – A defender will be selected.
A die is thrown once. Find the probability of getting a composite number
A die is thrown, find the probability of getting:
a prime number
In a single throw of a die, find the probability that the number:
(i) will be an even number.
(ii) will be an odd number.
(iii) will not be an even number.
You are walking along a street. If you just choose a stranger crossing you, what is the probability that his next birthday will fall on a Sunday?
Sonia picks up a card from the given cards.
Calculate the probability of getting an odd number
Sonia picks up a card from the given cards.
Calculate the probability of getting B card bearing number > 7
