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Question 80Asked in DSSSB TGT Computer Science (Technical), 12 Sep 2025, Shift 3 (5:00 PM)

The product of the matrices [ 1 1 2 ]

The product of the matrices [ 1 1 2 ] [ 1 2 2 ] [ 2 3 3 ] and [ 1 2 1 ] [ −1 0 3 ] [ 2 3 1 ] is _______.
  1. A[ 4 8 6 ] [ 3 8 9 ] [ 5 13 11 ]
  2. B[ 4 8 6 ] [ 3 8 9 ] [ 5 13 14 ]
  3. C[ 6 8 4 ] [ 3 8 9 ] [ 11 13 14 ]
  4. D[ 6 8 4 ] [ 3 8 9 ] [ 5 13 14 ]
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Correct answer: (B) [ 4 8 6 ] [ 3 8 9 ] [ 5 13 14 ]

Explanation

Row 1 × columns: 1−1+4 = 4, 2+0+6 = 8, 1+3+2 = 6. Row 2: 3, 8, 9. Row 3: 2−3+6 = 5, 4+0+9 = 13, 2+9+3 = 14. This matches option B.

From DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 3 (5:00 PM)

This is question 80 of DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 3 (5:00 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.