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By Interchanging the given two numbers which of the following equation will be not correct?7 and 9

3381Medium DSSSB TGT Computer Science 0 replies

By Interchanging the given two numbers which of the following equation will be not correct?

7 and 9

A9 – 7 + 3 = 1
B9 × 4 – 7 × 3 = 4
C9 × 1 – 7 × 2 = –11
D7 × 2 + 9 – 4 = 21

Correct answer: B

Explanation

After interchanging 7 and 9, option 2 becomes 7 × 4 − 9 × 3 = 28 − 27 = 1, which is not equal to 4. The other three equations remain correct, so option 2 is incorrect.

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