AMC10 2006 A
AMC10 2006 A · Q3
AMC10 2006 A · Q3. It mainly tests Ratios & proportions.
The ratio of Mary's age to Alice's age is 3 : 5. Alice is 30 years old. How many years old is Mary?
Mary的年龄与Alice的年龄之比为3:5。Alice 30岁。Mary 多大岁数？
(A)
15
15
(B)
18
18
(C)
20
20
(D)
24
24
(E)
50
50
Answer
Correct choice: (B)
正确答案：（B）
Solution
Mary is $(3/5)(30) = 18$ years old.
Mary是$(3/5)(30) = 18$岁。
Topics
Related Questions
Practice full AMC exams on amcdrill.
Try full-length practice and diagnostics at www.amcdrill.com.