Question:
If a fair coin is tossed two times, the probability that the first or the second toss will be heads is ________ (rounded off to two decimal places).
If a fair coin is tossed two times, the probability that the first or the second toss will be heads is ________ (rounded off to two decimal places).
Updated On: Oct 1, 2024
Hide Solution
Verified By Collegedunia
Correct Answer: 0.75
Solution and Explanation
The Correct answer is :0.75
Was this answer helpful?
0
0
Top Questions on Probability
- The probability of a boy winning a game is \( \frac{2}{3} \). Let \( n \) denote the least number of times he must play the game so that the probability of winning the game at least once is more than 90%, and \( X \) denotes that number of times he wins the game. Hence \( n \), mean, variance, and standard deviation of the random variable \( X \) are respectively:
(A) 3
(B) \( \frac{2}{3} \)
(C) 2
(D) 0.81
Choose the correct answer from the options given below:- CUET (UG) - 2024
- Mathematics
- Probability
- A coin is tossed twice. Then Match List-I with List-II:
List-I List-II (Adverbs) (A) P(exactly 2 heads) (I) \(\frac{1}{4}\) (B) P(at least 1 head) (II) \(1\) (C) P(at most 2 heads) (III) \(\frac{3}{4}\) (D) P(exactly 1 head) (IV) \(\frac{1}{2}\)
Choose the correct answer from the options given below :- CUET (UG) - 2024
- Mathematics
- Probability
- A pair of dice is rolled . If the two numbers appearing on them are different the probability that
Match List-I with List-II
LIST-I(EVENT) LIST-II(PROBABILITY) (A) The sum of the number is greater than 11 (i) 0 (B) The sum of the number is 4 or less (ii) 1/15 (C) The sum of the number is 4 (iii) 2/15 (D) The sum of the number is 4 (iv) 3/15 Choose the correct answer from the option given below
- CUET (UG) - 2024
- Mathematics
- Probability
- In a series of 4 trials, the probability of getting two successes is equal to the probability of getting three successes. The probability of getting at least one success is:
- CUET (UG) - 2024
- Mathematics
- Probability
- Two events \(X\) and \(Y\) are such that \(P(X) = \frac{1}{3}\), \(P(Y) = n\), and the probability of occurrence of at least one event is 0.8. If the events are independent, then the value of \(n\) is:
- CUET (UG) - 2024
- Mathematics
- Probability
View More Questions
Questions Asked in IIT JAM BT exam
- A population of 1000 plants are in Hardy-Weinberg equilibrium. Two alleles R and r determine a particular trait in this population. If the number of plants with RR genotype is 640, Rr genotype is 320 and rr genotype is 40, the frequency of r allele (in percentage) in this population is __________/ (rounded off to the nearest integer).
- IIT JAM BT - 2024
- Genetics
- A box of mass 20 ππ is pulled at constant speed across a floor by a rope. The rope makes an angle of 45Β° with the horizontal. Assuming that friction is negligible, the work done in pulling the box by a distance of 20 π is _____ π½ (rounded off to the nearest integer). (Use $π = 9.8 ππ ^{β2}$)
- IIT JAM BT - 2024
- Friction
- A ball dropped from a bridge hits the surface of the water in 3 π . The height of the bridge, ignoring air resistance, is ___ π (rounded off to one decimal place). (Use $π = 9.8 ππ ^{β2}$)
- IIT JAM BT - 2024
- Motion in a plane
- Adenine constitutes 0.16 mole fraction in a given single-stranded DNA. What is the mole fraction of uracil in the resultant RNA, if this entire DNA fragment is transcribed?
- IIT JAM BT - 2024
- DNA replication, transcription and translation
- The amount of agarose required to prepare 250 ππΏ of 0.8% agarose gel is _______ πππππ (rounded off to the nearest integer).
- IIT JAM BT - 2024
- Percentage Composition
View More Questions