# If r.v. X : waiting time in minutes for bus and p.d.f. of X is given by

If r.v. X : waiting time in minutes for bus and p.d.f. of X is given by

$$f(x)= \{\frac{\frac{1}{5},}{0,} \ \ \frac{0\leq x\leq 5, }{otherwise,}$$

then probability of waiting time not more than 4 minutes is = _______

A) 0.3  B) 0.8  C) 0.2 D) 0.5

$$f(x)= \{\frac{\frac{1}{5},}{0,} \ \ \frac{0\leq x\leq 5, }{otherwise,}$$