Question

Louis is competing in a trivia tournament and has the highest average after 5 rounds, with scores of 214,

231, 242, 223, and 270. In order to maintain this exact average, what must Louis score in the sixth round?
A
200
B
214
223
D
236
241

Answer 1

236

Explanation:

Louis's average before the sixth round:

=(214+231+242+223+270)÷5

=1180÷5

=236

After the sixth round:

236=(214+231+242+223+270+unknown value) ÷6

236= (1180+unknown value) ÷6

Multiple both sides by 6

236X6=1180 + unknown value

1416=1180 + unknown value

1416 - 1180 = unknown value

Unknown value =236