English

Two coins are tossed simultaneously. What is the probability of getting at least one head? - Mathematics

Advertisements
Advertisements

Question

Two coins are tossed simultaneously. What is the probability of getting at least one head?
  

Sum

Solution

GIVEN: Two coins are tossed simultaneously.

TO FIND: Probability of getting at least one head.

When two coins are tossed then the outcome will be

TT, HT, TH, HH.

Hence total number of outcome is 4.

At least one head means 1H or 2H.

Hence total number of favorable outcome i.e. at least one head is 3

`"We know that PROBABILITY" =" Nummber of favourable event"/"Total number of event"`

Hence probability of getting at least one head = `3/4`

shaalaa.com
  Is there an error in this question or solution?
Chapter 16: Probability - Exercise 16.3 [Page 35]

APPEARS IN

RD Sharma Mathematics [English] Class 10
Chapter 16 Probability
Exercise 16.3 | Q 9 | Page 35

RELATED QUESTIONS

Find the class mark of the classes 20-30 and 30-40.


A number x is selected at random from the numbers 1, 2, 3, and 4. Another number y is selected at random from the numbers 1, 4, 9 and 16. Find the probability that product of x and y is less than 16.


Three different coins are tossed together. Find the probability of getting at least two tails.


A bag contains 18 balls out of which x balls are red.

(i) If one ball is drawn at random from the bag, what is the probability that it is not red?
(ii) If 2 more red balls are put in the bag, the probability of drawing a red ball will be `9/8` times the probability of drawing a red ball in the first case. Find the value of x.


Choose the correct alternative answer for the following question.

If n(A) = 2, P(A) = `1/5`, then n(S) = ?


The king, queen and jack of clubs are removed form 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  a queen of diamond.

 


In the probability that the digit is a multiple of 3 is


17 cards numbered 1, 2, 3, 4, .... ,17 are put in a box and mixed thoroughly. A card is drawn at random from the box. Find the probability that the card drawn bears an odd number.


A card is drawn from a well-shuffled pack of 52 cards. Find the probability of getting a red face card.


Two different dice are rolled simultaneously. Find the probability that the sum of the numbers on the two dice is 10.


A bag contains 18 balls out of which x balls are red. If two more red balls are put in the bag, the probability of drawing a red ball will be  `9/8` times the probability of drawing a red ball in the first case. Find the value of x.


A jar contains 54 marbles, each of which some are blue, some are green and some are white. The probability of selecting a blue marble at random is `1/3` and the probability of selecting a green marble at random is `4/9`. How many white marbles does the jar contain?


Three coins are tossed simultaneously. What is the probability of getting exactly two heads?


A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is:
(i) a red ball
(ii) not a red ball
(iii) a white ball.


From 10 identical cards, numbered 1, 2, 3, ……, 10, one card is drawn at random. Find the probability that the number on the card drawn is a multiple of

2


A die is thrown once. Find the probability of getting:

a prime number


A die is thrown once. Find the probability of getting:

a number less than 6


A coin is tossed once. Find the probability of not getting a head


One ticket is selected at random from 100 tickets numbered 0.0, 01, 02, ……, 99. Suppose x is the sum of digits and y is the product of digits, then the probability that x = 9 and y = 0 is ____________.


The total number of outcomes when a coin is tossed is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×