Q282
If the operation '*' is defined by a * b = a + b - ab, then 5 * 7 equals :
A.
12
B.
- 47
C.
- 23
AnswerD.
35
Answer: Option C
Solution
Answer: Option C
Solution:
5 * 7 = 5 + 7 - 5 × 7
= 12 - 35
= - 23