If a * b=2 a-3 b+a b, then 3 * 5+5 * 3 is equal to · ABC26GN1179

Subject: General Aptitude · Chapter: Simplification

If $a * b=2 a-3 b+a b$, then $3 * 5+5 * 3$ is equal to

(a)22

(b)24

(c)26

(d)28

Answer

Answer (as printed): A

Explanation

$$\begin{aligned} 3 * 5+5 * 3 & =(2 \times 3-3 \times 5+3 \times 5)+(2 \times 5-3 \times 3 \\ +5 \times 3) & =(6+10-9+15)=22 . \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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