A coin is thrown 4 times. What is the probability of getting at least three heads?
Answer & explanation
Correct answer: option 3
The correct answer is Option 3: $\frac{5}{16}$
- HHHT, HHTH, HTHH, THHH (4 cases of exactly 3 heads)
- HHHH (1 case of 4 heads)
Total favourable outcomes = 5
Total number of outcomes = 2n
= 24
= 16
Probability of getting atleast 3 heads = \(\frac{ 5 }{ 16 }\)