If (M5_{ten} = 1001011_{two}) find the value of M

A.
5 
B.
6 
C.
7 
D.
8
Correct Answer: Option C
Explanation
(M5_{ten} = 1001011_{two}\
=1 times 2^6 + 0times 2^5 + 0times 2^4 + 1times 2^3 + 0times 2^2 + 1times 2^1 \
=64+8+2+1=75_{ten}\
∴ m = 7 )