Probability that the majority of 3 classifiers are wrong 3 classifiers. Each classifier has $0.7$ accuracy and makes its error independently.

How do I calculate the probability that the majority of three classifiers are wrong?

how I'm trying to solve it:

(3 choose 2) * 0.3 * 0.3 * 0.7 * 0.3 * 0.3 * 0.3
A similar question has been asked/answered here, but with 17 classifiers. Simply use their solution and change from 17 to 3 to apply to here.
To improve the accuracy, a majority vote is taken. What is the probability of an incorrect classification?
Hint: Majority means it could potentially be either $3$ or $2$. The probability of majority of the classifiers being wrong is the probability that either $2$ are wrong or all $3$ are wrong.  Example: Probability that $k$ out of $n$ independent trials of a random experiment are successful, with the probability of success being $p$ is ${n \choose k}p^k(1-p)^{n-k}$.