Question

Laura is bowling 5 games. Her first 4 scores were 83, 131, 100, and 147. To end up with an average score of at least 122.2, what is the lowest score Laura will need in the fifth game?

Answer 1

Average = sum / total number

total game bowled by laura = 5

first 4 scores are 83, 131, 100, and 147

Let x be the fifth score

The average score = 122.2

Since average = sum / total number

122.2 = 83 + 131 + 100 + 147 + x / 5

introducting cross multiplibcation

122.2 x 5 = 83 + 131 + 100 + 147 + x

611 = 461 + x

let isolate x by collecting the like terms

x = 611 - 461

x = 150

The least score to have an average of 122.2 is 150

Therefore, the answer is 150 for the fifth score