Question

hi can someone please answer this question. thank you. i really need the complete step-by-step solution for number 9 and 10. ❤️​

Answer 1

Refer to the attachments

Answer 2

Answer:

• General mean formula:

${ \boxed{ \rm{mean = \frac{1}{2}(first \: term + last \: term) }}}$

Question 9:

${ \rm{mean = \frac{1}{2} (12 + ( - 3))}} \\ \\ { \underline{ \underline{ \rm{ \: \: mean = 4.5 \: terms \: \: }}}}$

Question 10:

${ \rm{mean = \frac{1}{2}(24 + 68) }} \\ \\ { \underline{ \underline{ \rm{ \: \: mean = 46 \: terms \: \: }}}}$