Given below is the frequency distribution of daily wages (in ₹) of 30 workers in a certain factory

A worker is selected at random. Find the probability that his wage is

(i) less than ₹ 150.

(ii) atleast ₹ 210.

(iii) more than or equal to ₹ 150 but less than

₹ 210.

Total number of workers = 30 [given]

(i) Number of workers Whose wage is less than ₹ 150

=3+4=7

∴ Probability that a worker gets wage less than ₹150

=7/30

(ii) Number of workers whose wage is atleast ₹ 210

=4+3=7

Probability that a worker gets wage of atleast ₹ 210

=7/30

(iii) Number of workers whose wage is more than or equal to₹ 150 but less than ₹ 210

= 5+6+5 = 16

∴ Probability that a worker gets wage is more than or equal to ₹ 150 but less than ₹ 210 =16/30=8/5