Let P = \left[\begin{array}{ccc}1 & 1 & −1 \ 2 & −3 & 4 \ 3 & −2 & 3 \ ]\end{array}:and\:Q = \left[\begin{array}{ccc}−1 & −2 & −1 \ 6 & 12 & 6 \ 5 & 10 & 5 \ ]\end{array} be two matrices. Then the rank of P + Q is ______.

GATE Computer Science (CS) 2017 Shift 2 Solved Paper

Question : 32 of 65

Marks: +1, -0

Let

P = {[\table 1 , 1 , −1 ; 2 , −3 , 4 ; 3 , −2 , 3 ; ]}:and\:Q = {[\table −1 , −2 , −1 ; 6 , 12 , 6 ; 5 , 10 , 5 ; ]}

be two matrices.
Then the rank of P + Q is ______.

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