Solve this multiple-choice question and choose the correct option.

Given data Number of coins = 3; each fair (unbiased). Concept/ApproachAt most two heads = 1 − P(three heads). Step-by-Step calculation Total outcomes = 23 = 8 P(3 heads) = 1 ÷ 8 P(at most 2 heads) = 1 − 1÷8 = 7÷8 Verification/AlternativeDirect sum: P(0H) + P(1H) + P(2H) = 1÷8 + 3÷8 + 3÷8 = 7÷8. Final Answer7/8

Curioustab

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

Aptitude Probability Difficulty: Easy

Choose an option

A

7/8
B

3/8
C

1/2
D

3/4

Answer

Correct Answer: 7/8

Explanation

Given data

Number of coins = 3; each fair (unbiased).

Concept/ApproachAt most two heads = 1 − P(three heads).

Step-by-Step calculation Total outcomes = 2³ = 8 P(3 heads) = 1 ÷ 8 P(at most 2 heads) = 1 − 1÷8 = 7÷8

Verification/AlternativeDirect sum: P(0H) + P(1H) + P(2H) = 1÷8 + 3÷8 + 3÷8 = 7÷8.

Final Answer7/8

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