Answer:
4.17%
Step-by-step explanation:
P = nCr pʳ qⁿ⁻ʳ
where n is the number of trials,
r is the number of successes,
p is the probability of success,
and q is the probability of failure (1−p).
Here, n = 15, r = 11, p = ½, and q = ½.
P = ₁₅C₁₁ (½)¹¹ (½)¹⁵⁻¹¹
P = 1365 (½)¹¹ (½)⁴
P = 1365 (½)¹⁵
P ≈ 0.0417
