小明前五次数学测验的平均成绩是88分,为了使平均成绩达到92.5分,小明要连续考多少次满分?

2024-12-01 23:01:49
推荐回答(2个)
回答1:

设小明要连续考x次满分,则有:
(5×88+100x)=92.5(x+5)
440+100x=92.5x+462.5
100x-92.5x=462.5-440
7.5x=22.5
x=3
所以小明要连续考3次满分

回答2:

设小明要连续考X次满分,则有:
5×88+100X=92.5×(5+X)