Question

If the sum of the last two digits of a three- digit number is divisible by 9, what is the probab
ility of the number being divisible by 3?
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Answer 1

Step-by-step explanation:

Given 2x+3y=7 ... (i)

and 3x+2y=3 ... (ii)

On subtracting (ii) from (i) we get

2x+3y−3x−2y=7−3

⟹−x+y=4

⟹x−y=−4

Hence, the answer is −4.