Answer:
Number of Adult's tickets sold on Saturday = 3,356
Number of Children's tickets sold on Saturday = 2, 928
Total number of tickets sold over these two days is 8,938.
Step-by-step explanation:
Here, <u>the number of tickets sold on FRIDAY:</u>
Adult Ticket sold = 1,678
Children's Tickets sold = 976
So, the total number of tickets sold on Friday  
= Sum of ( Adult + Children's ) tickets  = 1,678  + 976 = 2,654 ....  (1)
<u>The number of tickets sold on SATURDAY:</u>
Adult Ticket sold =   2 times as many as the number of adult tickets sold
on Friday 
=  1,678 x 2  = 3,356
Children's Tickets sold = 3 times as many as the number of children's
tickets sold on Friday.
=  976  x 3 = 2, 928
So, the total number of tickets sold on Saturday  
= Sum of ( Adult + Children's ) tickets  = 3,356 + 2,928 = 6, 284 ....  (2)
 Now, the total number of tickets booked in theese two days :
Sum of tickets booked on (Friday + Saturday) 
= 2,654 +  6, 284  =   8,938
Hence, total number of tickets sold over these two days is 8,938.