Question

If the number of policemen (a) is 4 less than 3 times the number of control stations (d), then the number of policemen in 50 stations is

• A. 140
• B. 146
• C. 150
• D. 156

Answer 1

The correct option is B 146

It is given that the number of policemen (a) is 4 less than 3 times the number of control stations (d).

So, the relationship can be expressed as:
$a=3d-4$

Now, the number of control stations
$=d=50$

Inserting the value, we get:
$a=3d-4$
$a=3\times 50-4$
$a=150-4$
$a=146$

∴ Number of policemen = 146