engineering mathematics MCQ #3978

A coin is tossed 3 times. What is the probability of getting at least 2 heads?

engineering mathematics MCQ #3978

  1. Question 1

    Q1. A coin is tossed 3 times. What is the probability of getting at least 2 heads?

    • A) 1 / 2
    • B) 3 / 8
    • C) 1 / 2 + 1 / 8
    • D) 4 / 8

    Answer: 1 / 2 + 1 / 8

    Explanation: Probability of exactly 2 heads + probability of 3 heads = 3C2 * (1/2)³ + (1/2)³ = 3/8 + 1/8 = 1/2.