A student suggests the following expression to represent the probability of achieving four successes in seven trials of a binomial experiment for which the probability of success is 0.3. (7 4 ) (0.3)^4 (0.4) ^3 What error did the student make? The second exponent should be a 7. The probabilities for success and failure were reversed from their proper positions. The probability of failure should be 0.7. The first exponent should be a 7