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If $x : y = 2$ : 5 and $y : z = 3$ : 4, then $x : z$ equals:

Competition practiceRatio, Percentage & Commercial Math

A3 : 10
B1 : 2
C6 : 15
D3 : 4

Step-by-Step Solution

Make

y

equal (LCM 15):

x : y = 6

: 15 and

y : z = 15

: 20. So

x : z = 6 : 20 = 3 : 10

.

Answer: A) 3 : 10

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