AMC8 1995

AMC8 1995 · Q14

AMC8 1995 · Q14. It mainly tests Linear equations, Percent.

A team won 40 of its first 50 games. How many of the remaining 40 games must this team win so it will won exactly 70% of its games for the season?

一支队伍在前50场比赛中赢了40场。要使该队整个赛季的胜率恰好为70%，它还需在剩余40场比赛中赢多少场？

(A) 20 20

(B) 23 23

(D) 30 30

(E) 35 35

Answer

Correct choice: (B)

正确答案：（B）

Solution

The total number of games for the season is 50+40 = 90 games. Since 70% of 90 games is 63, it follows that 63 − 40 = 23 more wins are needed.

赛季总比赛数为50+40 = 90场。90场的70%是63，因此还需要63 − 40 = 23场胜利。

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