Answer: Professional sporting event
Explanation:
Either direction can make Left turns from the center lane
Using the sum of an arithmetic sequence concept, the total number of seats in the hall is 2604
The number of seats in a row increases by 2 per row :
- First row = Row 23 - Row 1 = 22
- Last row = Row 42 - Row 23 = 19
Number of seats in row 1 = 65 - 2(22) = 65 - 44 = 21 seats
Number of seats in row 42 = 65 + 2(19) = 65 + 38 = 103 seats
Common difference = 2
<u>Using the sum of nth term in a sequence</u> :
Sn = n/2(a + l)
- a = <em>first</em><em> </em><em>term</em><em> </em>
- <em>l</em><em> </em><em>=</em><em> </em><em>last</em><em> </em><em>term</em><em> </em>
Sn = 42/2(21 + 103)
Sn = 21(21 + 103)
Sn = 21(124)
Sn = 2604
Therefore, the total Number of seats is 2604.
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