Quantitative Reasoning

Probability

Easy

Three unbiased coins are tossed. What is the probability of getting at most two heads?

3/10

7/8

5/3

2/5

✅ Correct Option: 2

Three coins give $2^3 = 8$ equally likely outcomes. At most two heads means all outcomes except HHH, that is $7$ outcomes, so the probability is $\frac{7}{8}$ .

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Two unbiased coins are tossed:

Match the List-I and List-II

List-I	List-II
(A) Probability of getting one head	(I) 3/4
(B) Probability of getting two heads	(II) 1/2
(C) Probability of getting at most one head	(III) 1/4
(D) Probability of getting three heads	(IV) 0

Choose the correct answer from the options given below:

Three unbiased coins are tossed. What is the probability of getting at most two heads?

Solution

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