This set of Aptitude Questions and Answers (MCQs) focuses on “Coins”.
1. Which of the following is a classic example of binomial distribution of probability?
a) Pack of cards
b) Throw a dice
c) Toss a coin
d) Number of students in class
View Answer
Explanation: Toss a coin is a classic example of binomial distribution of probability as there are only two outcomes in this case namely head or tail. Also, both the outcomes have an equal chance of coming which remains constant for any number of trials. This constant probability of getting a head or a tail is 1 / 2.
2. When you toss a coin twice, what is the probability of getting a head in both the attempts?
a) 1 / 4
b) 1
c) 0
d) 1 / 2
View Answer
Explanation:
Possible outcomes = HH, TT, HT, TH
Favorable outcomes = HH
Thus, Probability = 1 / 4.
3. When you toss a coin what is the probability of not getting a head?
a) 1
b) 1 / 2
c) 2
d) 0
View Answer
Explanation:
P (Not Head) = 1 – P(H)
= 1 – 1 / 2
= 1 / 2
4. When you toss a coin twice what is the probability of getting a tail in both the attempts?
a) 1 / 2
b) 1
c) 0
d) 1 / 4
View Answer
Explanation:
Possible outcomes = HH, TT, HT, TH
Favorable outcomes = TT
Thus, Probability = 1 / 4.
5. Two unbiased coins are tossed. What are the total number of outcomes?
a) 1
b) 2
c) 4
d) 6
View Answer
Explanation:
Possible outcomes = (HH, HT, TH, TT)
Thus, total number of outcomes are 4.
6. Two coins are tossed simultaneously. What is the probability of getting only one head after taking all the possibilities into consideration?
a) 1
b) 1 / 2
c) 3 / 4
d) 0
View Answer
Explanation:
Possible outcomes = (HH, HT, TH, TT)
Favorable outcomes = HT, TH
Thus, probability = 1 / 2.
7. Two unbiased coins are tossed. What is the probability of getting no less than 1 head after taking all the possibilities into consideration?
a) 0
b) 1
c) \(\frac {1}{2}\)
d) 3 / 4
View Answer
Explanation:
Possible outcomes = (HH, HT, TH, TT)
Favorable outcomes = HH, HT, TH
Thus, probability = 3 / 4.
8. Two unbiased coins are tossed. What is the probability of getting only one tail after taking all the possibilities into consideration?
a) \(\frac {1}{2}\)
b) 0
c) \(\frac {3}{4}\)
d) \(\frac {1}{4}\)
View Answer
Explanation:
Possible outcomes = (HH, HT, TH, TT)
Favorable outcomes = HT, TH
Thus, probability = \(\frac {1}{2}\).
9. Two unbiased coins are tossed. What is the probability of getting two tail?
a) \(\frac {3}{4}\)
b) \(\frac {1}{2}\)
c) \(\frac {1}{4}\)
d) 1
View Answer
Explanation:
Possible outcomes = (HH, HT, TH, TT)
Favorable outcomes = TT
Thus, probability = \(\frac {1}{4}\).
10. Which of the following options is incorrect when one coin is tossed?
a) P(H) = \(\frac {1}{2}\)
b) P(T) = \(\frac {1}{2}\)
c) P(H) + P(T) = 1
d) P(H) * P(T) = 1
View Answer
Explanation: P(H) * P(T) = 1 is incorrect as,
P(H) * P(T) = \(\frac {1}{2}\) * \(\frac {1}{2}\)
= \(\frac {1}{4}\)
To practice all aptitude questions, please visit “1000+ Quantitative Aptitude Questions”, “1000+ Logical Reasoning Questions”, and “Data Interpretation Questions”.
