If the operation '*' is defined by a * b = a + b - ab, then 5 * 7 equals :
A. 12
B. - 47
C. - 23
D. 35
Answer: Option C
Solution (By Examveda Team)
5 * 7= 5 + 7 - 5 × 7
= 12 - 35
= - 23
This Question Belongs to Arithmetic Ability >> Number System
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
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