If $a * b$ denote the bigger among a and b and $a \cdot b = a + b + 3(a*b)$, then $4 \cdot 7$ is equal to
Show Hint
- $4$
- $31$
- $10$
- $8$
The Correct Option is B
Solution and Explanation
Step 2: $4 \cdot 7 = 4 + 7 + 3(4*7) = 11 + 3 \times 7 = 11 + 21 = 32$. Not matching. Option (B) is $31$.}
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