# Statistics, probability help please !

by Calculator14
Tags: help!, probability, statistics
 P: 13 your answer is wrong i don think it is a dependent event the probability of a person with heart attack is 0.7 so the probability that among 4 at least 1 has heart attack = 1 - probability that none have = 1 - (0.3)$^{4}$ must be correct but verify it