Question 55 Answer and Explanation _ACT June 2011 Form 69F Math Section

Question 55 Answer and Explanation _ACT June 2011 Form 69F Math Section

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55. Given the matrix equation shown below, what is $\frac{b}{a}?$

$\begin{aligned}\begin{bmatrix} 3! \\ 2! \end{bmatrix}+\begin{bmatrix} 2! \\ 4! \end{bmatrix}=\begin{bmatrix} a \\ b \end{bmatrix}\end{aligned}$

(Note: Whenever n is a positive integer, the notation n! represents the product of the integers from n to 1. For example, 3! = 3 · 2 · 1.)

A. $\frac{13}{4}$

B. $\frac{6}{5}$

C. $\frac{4}{7}$

D. 4

E. 6

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation