Question

l8 - practice test
score: 95/100 answered: 19/20
question 20
laura is bowling 5 games. her first 4 scores were 116, 80, 111, and 94.
to end up with an average score of at least 116, what is the lowest score laura will need in the fifth game?
check answer

Explanation:

Step1: Calculate the total score needed for 5 games

The formula for the average is $\text{Average}=\frac{\text{Total Score}}{\text{Number of Games}}$.
If the average score is at least 116 for 5 games, then the total score needed is $116\times5 = 580$.

Step2: Calculate the sum of the first 4 scores

The sum of the first 4 scores is $116 + 80+111 + 94=401$.

Step3: Find the score needed in the fifth game

Let $x$ be the score in the fifth game.
We know that $401+x\geq580$.
Solving for $x$, we get $x\geq580 - 401$.
$x\geq179$.

Answer:

179