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Malina has to bowl four games in her league. She bowled a 149, 162, and a 152 in her first three games. She wants to have an average score of 154. What score does she need in her fourth game?

152
153
154
155

User Donnel
by
7.9k points

1 Answer

5 votes
To solve, we add the 4 numbers (including the one unknown) and divide that total by 4, and this equals the desired overall average of 154.

x= score needed on 4th game


(149 + 162 + 152 + x)/4= 154
add in parentheses

(463 + x)/4= 154
multiply both sides by 4; 4 "cancels out" on the left side

463 + x= 616
subtract 463 from both sides

x= 153


ANSWER: 153 is the score needed on the 4th game to reach the desired overall average of 154.

Hope this helps! :)
User The Vee
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8.2k points