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SATMathematics Practice Test 1

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Question : 8 of 58

Marks: +1, -0

If

\frac{a}{b}=2

,what is the value of

\frac{4b}{a}

?

0
1
2
4

Solution:

Since

\frac{a}{b}=2

, it follows that

\frac{b}{a}=\frac{1}{2}

,

Multiplying both sides of the equation by 4 given

4\left(\frac{b}{a}\right)=\frac{4b}{a}=2.

Choice A is incorrect because if

\frac{4b}{a}=0,

then

\frac{a}{b}

would be undefined.

Choice B is incorrect because if

\frac{4b}{a}=1

,then

\frac{a}{b}=4

.

Choice D is incorrect because if

\frac{4b}{a}=4

then

\frac{a}{b}=1

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