Question 244 of 417MediumMCQ
An experiment succeeds twice as often as it fails. Find the probability of at least 5 successes in 6 trials.
Solutions · 1
Official solution
p=32.
\[P(X\ge5) = {}^6C_5\left(\frac23\right)^5\left(\frac13\right)+{}^6C_6\left(\frac23\right)^6 = \frac{256}{729}\] Answer the question to unlock