Answer:
• Let x be the number of members
• In inequalities, at least means greater or equal ( ≥ )
[tex]{ \underline{ \mathfrak{ \: answer : }}}[/tex]
[tex]{ \boxed{ \boxed{ \rm{x + 1200 \geqslant 6000}}}}[/tex]
• To get the average, substitute for x as 99 and amount collected by each member