The average (arithmetic mean) of a set of n numbers is 19. If the average of the 6 greatest
numbers in the set is 29 and the average of the
remaining numbers is 7, what is the value of n?

Abacterium was found to contain a sequence of atcgggatcct in its genome. a few generations later, the sequence was found to be atcatcct. what type of mutation caused this change in the bacteria? a. duplication b. insertion c. inversion d. translocation