SAT数学题 A merchant sells three types of clocksChimes n time on the nth hour|Chimes once on the hour|Chimes once on the half hour Type A 10 10 Type B 5 Type C 3 3（是个表格,三列数对应上面的三栏,空的的就表示没有）A merchant

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SAT数学题 A merchant sells three types of clocksChimes n time on the nth hour|Chimes once on the hour|Chimes once on the half hour Type A 10 10 Type B 5 Type C 3 3（是个表格,三列数对应上面的三栏,空的的就表示没有）A merchant
SAT数学题 A merchant sells three types of clocks
Chimes n time on the nth hour|Chimes once on the hour|Chimes once on the half hour
Type A 10 10
Type B 5
Type C 3 3
（是个表格,三列数对应上面的三栏,空的的就表示没有）
A merchant sells three types of colcks that chime as indicated by the check marks in the table above.What is the total number of chimes of the inventory of clocks in the 90-minutes period from 7:15 to 8:45?
答案为什么是149?

SAT数学题 A merchant sells three types of clocksChimes n time on the nth hour|Chimes once on the hour|Chimes once on the half hour Type A 10 10 Type B 5 Type C 3 3（是个表格,三列数对应上面的三栏,空的的就表示没有）A merchant 英语 a merchant ship sat数学题一道,正答是A. sat数学题一道sat数学题正解a 不知道怎么做的 sat一道数学题问几道sat数学题问几道SAT数学题, sat数学题求助 SAT一道数学题(步骤) 请教一道SAT数学题~~~~~ SAT一道数学题(理由) SAT一道数学题(理由) SAT一道数学题(理由) 一道SAT的数学题, Se A Vida sat数学题一道求高手求问一道SAT数学题